diff --git a/src/Jiaowu.Api/Controllers/AttendanceController.cs b/src/Jiaowu.Api/Controllers/AttendanceController.cs
index 3c25a38..676dec1 100644
--- a/src/Jiaowu.Api/Controllers/AttendanceController.cs
+++ b/src/Jiaowu.Api/Controllers/AttendanceController.cs
@@ -44,7 +44,8 @@ public sealed class AttendanceController(
         page = Math.Max(1, page);
         pageSize = Math.Clamp(pageSize, 10, 50);
         var tasks = AccessibleTasks().AsNoTracking()
-            .Where(x => x.Status == TeachingTaskStatus.Published);
+            .Where(x => x.Status == TeachingTaskStatus.Published ||
+                        x.Status == TeachingTaskStatus.Closed);
         if (academicTermId.HasValue)
             tasks = tasks.Where(x => x.AcademicTermId == academicTermId);
         if (!string.IsNullOrWhiteSpace(keyword))
@@ -73,6 +74,7 @@ public sealed class AttendanceController(
             .Select(x => new
             {
                 x.Id,
+                x.Status,
                 x.TaskNumber,
                 x.Name,
                 x.AcademicTermId,
@@ -162,6 +164,8 @@ public sealed class AttendanceController(
         var task = await AccessibleTasks().AsNoTracking()
             .FirstOrDefaultAsync(x => x.Id == request.TeachingTaskId, cancellationToken);
         if (task is null) return NotFound();
+        if (!IsTaskOperable(task))
+            return ConflictProblem("教学任务已归档，不能新建考勤表。");
 
         var studentIds = await TeachingTaskRosterQuery
             .ForTask(db, request.TeachingTaskId)
@@ -258,6 +262,7 @@ public sealed class AttendanceController(
                 x.LocationRadiusMeters,
                 x.Notes,
                 x.SubmittedAt,
+                TaskStatus = x.TeachingTask!.Status,
                 TaskNumber = x.TeachingTask!.TaskNumber,
                 TaskName = x.TeachingTask.Name,
                 CourseCode = x.TeachingTask.Course!.Code,
@@ -295,7 +300,8 @@ public sealed class AttendanceController(
         var canManage = await CanManageTaskAsync(
             sheet.TeachingTaskId,
             cancellationToken);
-        var canEdit = sheet.Status == AttendanceSheetStatus.Draft && canManage;
+        var canEdit = sheet.Status == AttendanceSheetStatus.Draft &&
+                      sheet.TaskStatus == TeachingTaskStatus.Published && canManage;
         var now = DateTime.UtcNow;
         var attempts = await db.AttendanceCheckInAttempts.AsNoTracking()
             .Where(x => x.AttendanceSheetId == id)
@@ -758,6 +764,7 @@ public sealed class AttendanceController(
             .Where(x =>
                 x.StudentId == studentId.Value &&
                 x.AttendanceSheet!.Status == AttendanceSheetStatus.Draft &&
+                x.AttendanceSheet.TeachingTask!.Status == TeachingTaskStatus.Published &&
                 x.AttendanceSheet.CheckInMethod == AttendanceCheckInMethod.Location &&
                 x.AttendanceSheet.CheckInStartsAt <= now &&
                 x.AttendanceSheet.CheckInEndsAt >= now)
@@ -791,6 +798,7 @@ public sealed class AttendanceController(
 
         var source = db.AttendanceRecords
             .Include(x => x.AttendanceSheet)
+            .ThenInclude(x => x!.TeachingTask)
             .Where(x => x.StudentId == studentId.Value);
         if (!string.IsNullOrWhiteSpace(request.Token))
         {
@@ -813,6 +821,8 @@ public sealed class AttendanceController(
         var record = await source.FirstOrDefaultAsync(cancellationToken);
         if (record?.AttendanceSheet is null) return NotFound();
         var sheet = record.AttendanceSheet;
+        if (!IsTaskOperable(sheet.TeachingTask!))
+            return ConflictProblem("教学任务已归档，签到活动已停止。");
         var now = DateTime.UtcNow;
 
         async Task<ActionResult> RejectAttemptAsync(
@@ -1011,11 +1021,15 @@ public sealed class AttendanceController(
             return ConflictProblem("当前账号未关联学生档案。");
 
         var record = await db.AttendanceRecords
+            .Include(r => r.AttendanceSheet)
+            .ThenInclude(s => s!.TeachingTask)
             .FirstOrDefaultAsync(r =>
                 r.AttendanceSheetId == request.AttendanceSheetId &&
                 r.StudentId == studentId.Value,
                 cancellationToken);
         if (record is null) return NotFound();
+        if (!IsTaskOperable(record.AttendanceSheet!.TeachingTask!))
+            return ConflictProblem("教学任务已归档，不能提交考勤申诉。");
         if (record.AppealStatus == AttendanceAppealStatus.Pending)
             return ConflictProblem("已有申诉正在处理中。");
         if (record.AppealStatus == AttendanceAppealStatus.Approved)
@@ -1202,10 +1216,14 @@ public sealed class AttendanceController(
     }
 
     private bool CanManageSheet(AttendanceSheet sheet) =>
-        currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
+        IsTaskOperable(sheet.TeachingTask!) &&
+        (currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
         currentUserDataScope.Current.IsInRole(SystemRoles.AcademicAdmin) ||
         sheet.TeachingTask!.Teachers.Any(x =>
-            x.Teacher?.UserId == currentUserDataScope.Current.UserId);
+            x.Teacher?.UserId == currentUserDataScope.Current.UserId));
+
+    private static bool IsTaskOperable(TeachingTask task) =>
+        task.Status == TeachingTaskStatus.Published;
 
     private async Task<bool> CanManageTaskAsync(
         Guid teachingTaskId,
diff --git a/src/Jiaowu.Api/Controllers/ExperimentGradesController.cs b/src/Jiaowu.Api/Controllers/ExperimentGradesController.cs
index 363567f..5bb9da2 100644
--- a/src/Jiaowu.Api/Controllers/ExperimentGradesController.cs
+++ b/src/Jiaowu.Api/Controllers/ExperimentGradesController.cs
@@ -89,6 +89,7 @@ public sealed class ExperimentGradesController(
             .GroupBy(x => new
             {
                 x.TeachingTaskId,
+                TaskStatus = x.TeachingTask!.Status,
                 StartDate = x.TeachingTask!.AcademicTerm!.StartDate,
                 x.TeachingTask.TaskNumber
             })
@@ -114,6 +115,7 @@ public sealed class ExperimentGradesController(
                 x.ScheduleWeek,
                 ProjectStatus = x.Status,
                 x.TeachingTaskId,
+                TaskStatus = x.TeachingTask!.Status,
                 x.TeachingTask!.TaskNumber,
                 TaskName = x.TeachingTask.Name,
                 AcademicTermId = x.TeachingTask.AcademicTermId,
@@ -567,7 +569,8 @@ public sealed class ExperimentGradesController(
             .SingleAsync(
                 x => x.Id == sheet.TeachingTaskId,
                 cancellationToken);
-        var canReview = CanReviewCollege(sheet.CourseCollegeId) &&
+        var isTaskOperable = IsTaskOperable(task);
+        var canReview = isTaskOperable && CanReviewCollege(sheet.CourseCollegeId) &&
                         sheet.Status ==
                             ExperimentGradeSheetStatus.Submitted;
         return Ok(new
@@ -603,12 +606,12 @@ public sealed class ExperimentGradesController(
                 sheet.CreatedAt,
                 sheet.UpdatedAt
             },
-            CanEdit = (CanEdit(task) || isBoundInstructor) &&
+            CanEdit = isTaskOperable && (CanEdit(task) || isBoundInstructor) &&
                 sheet.Status is
                     ExperimentGradeSheetStatus.Draft or
                     ExperimentGradeSheetStatus.Returned,
             CanReview = canReview,
-            CanPublish = IsPublisher() &&
+            CanPublish = isTaskOperable && IsPublisher() &&
                 sheet.Status == ExperimentGradeSheetStatus.Approved
         });
     }
@@ -1074,6 +1077,8 @@ public sealed class ExperimentGradesController(
     {
         var sheet = await LoadForWorkflowAsync(id, cancellationToken);
         if (sheet is null) return NotFound();
+        if (!IsTaskOperable(sheet.ExperimentProject!.TeachingTask!))
+            return TaskArchivedProblem();
         var collegeId = sheet.ExperimentProject!.TeachingTask!.Course!.CollegeId;
         if (!CanReviewCollege(collegeId)) return Forbid();
         if (sheet.Status != ExperimentGradeSheetStatus.Submitted)
@@ -1100,6 +1105,8 @@ public sealed class ExperimentGradesController(
     {
         var sheet = await LoadForWorkflowAsync(id, cancellationToken);
         if (sheet is null) return NotFound();
+        if (!IsTaskOperable(sheet.ExperimentProject!.TeachingTask!))
+            return TaskArchivedProblem();
         var collegeId = sheet.ExperimentProject!.TeachingTask!.Course!.CollegeId;
         if (!CanReviewCollege(collegeId)) return Forbid();
         if (sheet.Status != ExperimentGradeSheetStatus.Submitted)
@@ -1127,6 +1134,8 @@ public sealed class ExperimentGradesController(
     {
         var sheet = await LoadForWorkflowAsync(id, cancellationToken);
         if (sheet is null) return NotFound();
+        if (!IsTaskOperable(sheet.ExperimentProject!.TeachingTask!))
+            return TaskArchivedProblem();
         if (!IsPublisher()) return Forbid();
         if (sheet.Status != ExperimentGradeSheetStatus.Approved)
             return ConflictProblem("只有审核通过的实验成绩单可以发布。");
@@ -1291,21 +1300,23 @@ public sealed class ExperimentGradesController(
     }
 
     private bool CanInitialize(TeachingTask task) =>
-        currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
+        IsTaskOperable(task) &&
+        (currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
         currentUserDataScope.Current.IsInRole(SystemRoles.AcademicAdmin) ||
         currentUserDataScope.Current.IsInRole(SystemRoles.CollegeAdmin) ||
-        IsAssignedTeacher(task);
+        IsAssignedTeacher(task));
 
     private bool CanEdit(TeachingTask task) =>
-        currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
-        IsAssignedTeacher(task);
+        IsTaskOperable(task) && (currentUserDataScope.Current.IsInRole(SystemRoles.SuperAdmin) ||
+                                 IsAssignedTeacher(task));
 
     private bool CanEditBoundSessionRecords(
         ExperimentGradeSheet sheet,
         IReadOnlyCollection<ExperimentGradeRecordRequest> requestedRecords)
     {
         var scope = currentUserDataScope.Current;
-        if (sheet.ExperimentProject!.ArrangementMode != ExperimentArrangementMode.SelfScheduled ||
+        if (!IsTaskOperable(sheet.ExperimentProject!.TeachingTask!) ||
+            sheet.ExperimentProject!.ArrangementMode != ExperimentArrangementMode.SelfScheduled ||
             scope.Scope != DataScope.Self || !scope.IsInRole(SystemRoles.Teacher) ||
             requestedRecords.Count == 0)
             return false;
@@ -1320,6 +1331,12 @@ public sealed class ExperimentGradesController(
         task.Teachers.Any(x =>
             x.Teacher?.UserId == currentUserDataScope.Current.UserId);
 
+    private static bool IsTaskOperable(TeachingTask task) =>
+        task.Status == TeachingTaskStatus.Published;
+
+    private ActionResult TaskArchivedProblem() =>
+        ConflictProblem("教学任务已归档，实验成绩仅可查看或导出，不能再操作。");
+
     private bool CanReviewCollege(Guid collegeId)
     {
         var scope = currentUserDataScope.Current;
diff --git a/src/Jiaowu.Api/Controllers/ExperimentsController.cs b/src/Jiaowu.Api/Controllers/ExperimentsController.cs
index fdd08cb..e3067b3 100644
--- a/src/Jiaowu.Api/Controllers/ExperimentsController.cs
+++ b/src/Jiaowu.Api/Controllers/ExperimentsController.cs
@@ -272,6 +272,7 @@ public sealed class ExperimentsController(
                 x.Status,
                 x.PublishedAt,
                 x.ClosedAt,
+                TeachingTaskStatus = x.TeachingTask!.Status,
                 AcademicTermId = x.TeachingTask!.AcademicTermId,
                 TermName = x.TeachingTask.AcademicTerm!.Name,
                 TaskNumber = x.TeachingTask.TaskNumber,
@@ -368,6 +369,7 @@ public sealed class ExperimentsController(
                 x.SelectionStartsAt,
                 x.SelectionEndsAt,
                 x.Status,
+                TeachingTaskStatus = x.TeachingTask!.Status,
                 AcademicTermId = x.TeachingTask!.AcademicTermId,
                 TermName = x.TeachingTask.AcademicTerm!.Name,
                 TaskNumber = x.TeachingTask.TaskNumber,
@@ -687,6 +689,8 @@ public sealed class ExperimentsController(
             .ThenInclude(x => x!.AcademicTerm)
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status != ExperimentProjectStatus.Draft)
             return ConflictProblem("只有草稿实验项目可以修改。");
         if (project.TeachingTaskId != request.TeachingTaskId)
@@ -729,8 +733,11 @@ public sealed class ExperimentsController(
         CancellationToken cancellationToken)
     {
         var project = await ScopedProjects()
+            .Include(x => x.TeachingTask)
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status != ExperimentProjectStatus.Draft)
             return ConflictProblem("只有草稿实验项目可以删除。");
 
@@ -754,6 +761,8 @@ public sealed class ExperimentsController(
             .ThenInclude(x => x!.Course)
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status != ExperimentProjectStatus.Published)
             return ConflictProblem("只有已发布实验项目可以修正教学内容。");
         if (!CanCorrectPublishedProject(project.TeachingTask!)) return Forbid();
@@ -786,11 +795,14 @@ public sealed class ExperimentsController(
             return ValidationProblem("请为每个已选实验项目填写一个名称，每行一个且数量必须一致。");
 
         var projects = await ScopedProjects()
+            .Include(x => x.TeachingTask)
             .Where(x => ids.Contains(x.Id))
             .ToListAsync(cancellationToken);
         if (projects.Count != ids.Count) return NotFound();
         if (projects.Any(x => x.Status != ExperimentProjectStatus.Draft))
             return ConflictProblem("批量修改名称只能包含草稿实验项目。");
+        if (projects.Any(x => !IsTaskOperable(x.TeachingTask!)))
+            return TaskArchivedProblem();
 
         var projectsById = projects.ToDictionary(x => x.Id);
         for (var index = 0; index < ids.Count; index++)
@@ -809,11 +821,14 @@ public sealed class ExperimentsController(
         var ids = ValidateBulkProjectIds(request.ProjectIds);
         if (ids is null) return ValidationProblem("请选择 1 至 100 个实验项目。");
         var projects = await ScopedProjects()
+            .Include(x => x.TeachingTask)
             .Where(x => ids.Contains(x.Id))
             .ToListAsync(cancellationToken);
         if (projects.Count != ids.Count) return NotFound();
         if (projects.Any(x => x.Status != ExperimentProjectStatus.Draft))
             return ConflictProblem("批量删除只能包含草稿实验项目。");
+        if (projects.Any(x => !IsTaskOperable(x.TeachingTask!)))
+            return TaskArchivedProblem();
 
         db.ExperimentProjects.RemoveRange(projects);
         await db.SaveChangesAsync(cancellationToken);
@@ -833,6 +848,8 @@ public sealed class ExperimentsController(
             .ThenInclude(x => x!.Course)
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status != ExperimentProjectStatus.Draft)
             return ConflictProblem("只有草稿实验项目可以发布。");
         var hasSchedule = project.ArrangementMode == ExperimentArrangementMode.Centralized
@@ -872,8 +889,14 @@ public sealed class ExperimentsController(
     {
         var ids = ValidateBulkProjectIds(request.ProjectIds);
         if (ids is null) return ValidationProblem("请选择 1 至 100 个实验项目。");
-        if (await ScopedProjects().CountAsync(x => ids.Contains(x.Id), cancellationToken) != ids.Count)
+        var projects = await ScopedProjects().AsNoTracking()
+            .Where(x => ids.Contains(x.Id))
+            .Select(x => new { x.Id, x.TeachingTask!.Status })
+            .ToListAsync(cancellationToken);
+        if (projects.Count != ids.Count)
             return NotFound();
+        if (projects.Any(x => x.Status != TeachingTaskStatus.Published))
+            return TaskArchivedProblem();
         var userId = currentUserDataScope.Current.UserId;
         var job = new ExamPublishJob
         {
@@ -908,8 +931,11 @@ public sealed class ExperimentsController(
         CancellationToken cancellationToken)
     {
         var project = await ScopedProjects()
+            .Include(x => x.TeachingTask)
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status != ExperimentProjectStatus.Published)
             return ConflictProblem("只有已发布实验项目可以关闭。");
         project.Status = ExperimentProjectStatus.Closed;
@@ -930,6 +956,8 @@ public sealed class ExperimentsController(
             .ThenInclude(x => x!.AcademicTerm)
             .FirstOrDefaultAsync(x => x.Id == projectId, cancellationToken);
         if (project is null) return NotFound();
+        if (!IsTaskOperable(project.TeachingTask!))
+            return TaskArchivedProblem();
         if (project.Status == ExperimentProjectStatus.Closed)
             return ConflictProblem("已关闭实验项目不能再增加场次。");
         if (project.ArrangementMode == ExperimentArrangementMode.Centralized)
@@ -1009,6 +1037,8 @@ public sealed class ExperimentsController(
                 if (projects.Count != projectIds.Count)
                     return ValidationProblem(
                         "部分实验项目不存在或不在当前管理范围内。");
+                if (projects.Values.Any(x => !IsTaskOperable(x.TeachingTask!)))
+                    return TaskArchivedProblem();
 
                 var createdSessions = new List<(ExperimentProject Project, ExperimentSession Session)>(
                     request.Items.Count);
@@ -1100,6 +1130,8 @@ public sealed class ExperimentsController(
             .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
         if (session is null) return NotFound();
         if (!CanManageSession(session)) return Forbid();
+        if (!IsTaskOperable(session.ExperimentProject!.TeachingTask!))
+            return TaskArchivedProblem();
         if (session.Status == ExperimentSessionStatus.Cancelled)
             return NoContent();
 
@@ -1253,6 +1285,8 @@ public sealed class ExperimentsController(
                 var session = await LoadManagedSessionAsync(id, cancellationToken);
                 if (session is null) return NotFound();
                 if (!CanManageSession(session)) return Forbid();
+                if (!IsTaskOperable(session.ExperimentProject!.TeachingTask!))
+                    return TaskArchivedProblem();
                 if (session.Status != ExperimentSessionStatus.Scheduled ||
                     session.ExperimentProject!.Status != ExperimentProjectStatus.Published ||
                     session.ExperimentProject.ArrangementMode != ExperimentArrangementMode.SelfScheduled)
@@ -1327,6 +1361,8 @@ public sealed class ExperimentsController(
                 var session = await LoadManagedSessionAsync(id, cancellationToken);
                 if (session is null) return NotFound();
                 if (!CanManageSession(session)) return Forbid();
+                if (!IsTaskOperable(session.ExperimentProject!.TeachingTask!))
+                    return TaskArchivedProblem();
                 if (session.Status != ExperimentSessionStatus.Scheduled ||
                     session.ExperimentProject!.Status != ExperimentProjectStatus.Published ||
                     session.ExperimentProject.ArrangementMode != ExperimentArrangementMode.SelfScheduled)
@@ -1429,6 +1465,8 @@ public sealed class ExperimentsController(
                     session.ExperimentProject!.Status !=
                         ExperimentProjectStatus.Published)
                     return NotFound();
+                if (!IsTaskOperable(session.ExperimentProject.TeachingTask!))
+                    return TaskArchivedProblem();
                 if (session.ExperimentProject.ArrangementMode !=
                     ExperimentArrangementMode.SelfScheduled)
                     return ConflictProblem("集中安排实验无需学生预约。");
@@ -1517,11 +1555,15 @@ public sealed class ExperimentsController(
 
                 var booking = await db.ExperimentBookings
                     .Include(x => x.ExperimentSession)
+                    .ThenInclude(x => x!.ExperimentProject)
+                    .ThenInclude(x => x!.TeachingTask)
                     .FirstOrDefaultAsync(x =>
                         x.Id == id &&
                         x.StudentId == student.Id,
                         cancellationToken);
                 if (booking is null) return NotFound();
+                if (!IsTaskOperable(booking.ExperimentSession!.ExperimentProject!.TeachingTask!))
+                    return TaskArchivedProblem();
                 if (booking.Status == ExperimentBookingStatus.Cancelled)
                     return NoContent();
 
@@ -1847,6 +1889,12 @@ public sealed class ExperimentsController(
                    item.Teacher?.UserId == scope.UserId);
     }
 
+    private static bool IsTaskOperable(TeachingTask task) =>
+        task.Status == TeachingTaskStatus.Published;
+
+    private ActionResult TaskArchivedProblem() =>
+        ConflictProblem("教学任务已归档，实验项目、场次和预约仅可查看，不能再操作。");
+
     private Task<Student?> CurrentStudentAsync(
         CancellationToken cancellationToken) =>
         db.Students.FirstOrDefaultAsync(x =>
diff --git a/web/src/views/ExperimentGradesView.vue b/web/src/views/ExperimentGradesView.vue
index ac5dbd0..4752015 100644
--- a/web/src/views/ExperimentGradesView.vue
+++ b/web/src/views/ExperimentGradesView.vue
@@ -692,7 +692,7 @@ onMounted(async () => {
             <el-table-column label="操作" width="130" align="right">
               <template #default="{ row }">
                 <el-button v-if="row.sheet" type="primary" text :icon="EditPen" @click="openDetail(row)">打开成绩单</el-button>
-                <el-button v-else type="primary" text :icon="Plus" @click="openCreate(row)">建立成绩单</el-button>
+                <el-button v-else type="primary" text :icon="Plus" :disabled="row.taskStatus !== 'Published'" @click="openCreate(row)">建立成绩单</el-button>
               </template>
             </el-table-column>
           </el-table>
diff --git a/web/src/views/ExperimentsView.vue b/web/src/views/ExperimentsView.vue
index 40da898..b46bdd1 100644
--- a/web/src/views/ExperimentsView.vue
+++ b/web/src/views/ExperimentsView.vue
@@ -928,7 +928,7 @@ onMounted(async () => {
                       <div v-for="session in row.sessions" :key="session.id" class="student-session-option">
                         <div><b>{{ formatSessionTime(session) }}</b><span>{{ session.campusName }} · {{ session.buildingName }} {{ session.classroomName }} · 指导：{{ session.instructorNames?.join('、') || '待指定' }}</span></div>
                         <el-button v-if="session.canManage" size="small" text @click="showParticipants(row, session)">预约名单</el-button>
-                        <el-button v-if="session.canManage && session.status !== 'Cancelled'" size="small" text type="danger" @click="cancelSession(row, session)">{{ row.status === 'Draft' ? '删除' : '取消' }}</el-button>
+                        <el-button v-if="session.canManage && session.status !== 'Cancelled'" size="small" text type="danger" :disabled="row.teachingTaskStatus !== 'Published'" @click="cancelSession(row, session)">{{ row.status === 'Draft' ? '删除' : '取消' }}</el-button>
                       </div>
                     </div>
                   </el-popover>
@@ -945,18 +945,18 @@ onMounted(async () => {
             <el-table-column label="操作" width="244" fixed="right" align="right">
               <template #default="{ row }">
                 <template v-if="row.status === 'Draft'">
-                  <el-button size="small" text @click="openEditProject(row)">编辑</el-button>
-                  <el-button size="small" text type="danger" @click="deleteProject(row)">删除</el-button>
+                  <el-button size="small" text :disabled="row.teachingTaskStatus !== 'Published'" @click="openEditProject(row)">编辑</el-button>
+                  <el-button size="small" text type="danger" :disabled="row.teachingTaskStatus !== 'Published'" @click="deleteProject(row)">删除</el-button>
                   <el-button
                     size="small"
                     type="primary"
-                    :disabled="row.arrangementMode === 'Centralized' ? !row.scheduleEntry : !row.sessions.some((item: any) => item.status !== 'Cancelled')"
+                    :disabled="row.teachingTaskStatus !== 'Published' || (row.arrangementMode === 'Centralized' ? !row.scheduleEntry : !row.sessions.some((item: any) => item.status !== 'Cancelled'))"
                     @click="publishProject(row)"
                   >发布</el-button>
                 </template>
                 <template v-else-if="row.status === 'Published'">
-                  <el-button size="small" text @click="openCorrectPublishedProject(row)">修正内容</el-button>
-                  <el-button size="small" text @click="closeProject(row)">关闭项目</el-button>
+                  <el-button size="small" text :disabled="row.teachingTaskStatus !== 'Published'" @click="openCorrectPublishedProject(row)">修正内容</el-button>
+                  <el-button size="small" text :disabled="row.teachingTaskStatus !== 'Published'" @click="closeProject(row)">关闭项目</el-button>
                 </template>
                 <el-button
                   v-if="row.status !== 'Closed' && row.arrangementMode === 'SelfScheduled'"
@@ -1028,12 +1028,12 @@ onMounted(async () => {
                         </div>
                         <el-tag :type="sessionTagType(session)" size="small" effect="plain">余 {{ session.remainingCount }} / {{ session.capacity }}</el-tag>
                         <el-button v-if="row.myBooking?.experimentSessionId === session.id" size="small" type="success" :icon="Check" disabled>已预约</el-button>
-                        <el-button v-else size="small" type="primary" plain :disabled="row.status !== 'Published' || !!row.myBooking || session.remainingCount <= 0" @click="book(row, session)">预约</el-button>
+                        <el-button v-else size="small" type="primary" plain :disabled="row.status !== 'Published' || row.teachingTaskStatus !== 'Published' || !!row.myBooking || session.remainingCount <= 0" @click="book(row, session)">预约</el-button>
                       </div>
                       <el-empty v-if="!row.sessions.length" :image-size="42" description="暂无有效实验场次" />
                     </div>
                   </el-popover>
-                  <el-button v-if="row.myBooking && row.status === 'Published'" size="small" text type="danger" @click="cancelBooking(row)">取消</el-button>
+                  <el-button v-if="row.myBooking && row.status === 'Published' && row.teachingTaskStatus === 'Published'" size="small" text type="danger" @click="cancelBooking(row)">取消</el-button>
                 </template>
                 <span v-else class="table-muted">无需预约</span>
               </template>
@@ -1067,11 +1067,11 @@ onMounted(async () => {
                       </div>
                       <el-tag :type="sessionTagType(session)" size="small" effect="plain">余 {{ session.remainingCount }} / {{ session.capacity }}</el-tag>
                       <el-button v-if="row.myBooking?.experimentSessionId === session.id" size="small" type="success" disabled>已预约</el-button>
-                      <el-button v-else size="small" type="primary" plain :disabled="row.status !== 'Published' || !!row.myBooking || session.remainingCount <= 0" @click="book(row, session)">预约</el-button>
+                      <el-button v-else size="small" type="primary" plain :disabled="row.status !== 'Published' || row.teachingTaskStatus !== 'Published' || !!row.myBooking || session.remainingCount <= 0" @click="book(row, session)">预约</el-button>
                     </article>
                   </div>
                   <span v-else class="table-muted">暂无有效实验场次</span>
-                  <el-button v-if="row.myBooking && row.status === 'Published'" class="mobile-cancel-booking" size="small" text type="danger" @click="cancelBooking(row)">取消预约</el-button>
+                  <el-button v-if="row.myBooking && row.status === 'Published' && row.teachingTaskStatus === 'Published'" class="mobile-cancel-booking" size="small" text type="danger" @click="cancelBooking(row)">取消预约</el-button>
                 </template>
               </div>
             </article>
diff --git a/web/src/views/TeacherAttendanceView.vue b/web/src/views/TeacherAttendanceView.vue
index 459df86..8cc3a88 100644
--- a/web/src/views/TeacherAttendanceView.vue
+++ b/web/src/views/TeacherAttendanceView.vue
@@ -779,12 +779,12 @@ onUnmounted(() => {
           v-for="task in tasks"
           :key="task.id"
           type="button"
-          :class="{ active: selectedTask?.id === task.id }"
+          :class="{ active: selectedTask?.id === task.id, 'is-archived': task.status === 'Closed' }"
           @click="selectTask(task)"
         >
           <span>{{ task.courseCode }} · {{ task.taskNumber }}</span>
           <b>{{ task.courseName }}</b>
-          <small>{{ task.termName }} · {{ task.studentCount }} 名学生 · {{ task.sheetCount }} 张考勤表</small>
+          <small>{{ task.termName }} · {{ task.studentCount }} 名学生 · {{ task.sheetCount }} 张考勤表{{ task.status === 'Closed' ? ' · 已归档' : '' }}</small>
         </button>
         <el-empty v-if="!tasks.length" description="没有可点名的教学班" />
         <el-pagination
@@ -810,7 +810,7 @@ onUnmounted(() => {
                 <strong>{{ selectedTask.courseName }}</strong>
                 <span>{{ selectedTask.taskNumber }} · {{ selectedTask.studentCount }} 名学生</span>
               </div>
-              <el-button type="primary" :icon="Plus" @click="openCreate">新建考勤表</el-button>
+              <el-button type="primary" :icon="Plus" :disabled="selectedTask.status !== 'Published'" @click="openCreate">新建考勤表</el-button>
             </header>
             <div class="attendance-sheet-filters">
               <el-input
@@ -1344,6 +1344,7 @@ onUnmounted(() => {
   background: #e9f3f5;
   border-left: 3px solid #176b87;
 }
+.attendance-task-list button.is-archived { opacity: .58; }
 .attendance-task-list button > span {
   color: var(--teal);
   font: 700 10px/1.2 Consolas, monospace;