diff --git a/src/Jiaowu.Api/Controllers/TeachingTasksController.cs b/src/Jiaowu.Api/Controllers/TeachingTasksController.cs
index fa53ffc..c6149ff 100644
--- a/src/Jiaowu.Api/Controllers/TeachingTasksController.cs
+++ b/src/Jiaowu.Api/Controllers/TeachingTasksController.cs
@@ -614,12 +614,15 @@ public sealed class TeachingTasksController(
             return ValidationProblem("授课教师必须已完成该课程申报并经学院审核通过。");
 
         var classIds = request.ClassIds.Distinct().ToArray();
-        var classes = db.AdministrativeClasses.AsNoTracking()
-            .Where(x => classIds.Contains(x.Id));
-        if (collegeId.HasValue)
-            classes = classes.Where(x => x.Major!.CollegeId == collegeId.Value);
-        if (await classes.CountAsync(cancellationToken) != classIds.Length)
-            return ValidationProblem("存在无效或不在当前数据范围内的行政班。");
+        if (classIds.Length > 0)
+        {
+            var classes = db.AdministrativeClasses.AsNoTracking()
+                .Where(x => classIds.Contains(x.Id));
+            if (collegeId.HasValue)
+                classes = classes.Where(x => x.Major!.CollegeId == collegeId.Value);
+            if (await classes.CountAsync(cancellationToken) != classIds.Length)
+                return ValidationProblem("存在无效或不在当前数据范围内的行政班。");
+        }
         return null;
     }
 
@@ -661,13 +664,6 @@ public sealed class TeachingTasksController(
                 invalidPrimaryTeacher,
                 "发布前必须指定且只能指定一名主讲教师。");
 
-        var missingClass = tasks.FirstOrDefault(x => x.Classes.Count == 0);
-        if (missingClass is not null)
-            return PublishingProblem(
-                tasks,
-                missingClass,
-                "发布前至少需要关联一个行政班。");
-
         var termIds = tasks.Select(x => x.AcademicTermId).Distinct().ToArray();
         var courseIds = tasks.Select(x => x.CourseId).Distinct().ToArray();
         var teacherIds = tasks
diff --git a/web/src/views/TeachingTasksView.vue b/web/src/views/TeachingTasksView.vue
index db26dc7..c917e4c 100644
--- a/web/src/views/TeachingTasksView.vue
+++ b/web/src/views/TeachingTasksView.vue
@@ -597,7 +597,7 @@ onMounted(async () => {
 
     <section class="task-summary">
       <div><span>当前结果</span><b>{{ total }}</b><small>个教学班</small></div>
-      <p>{{ responsibilityText }} 发布时还会校验教师授课资格、行政班、容量和周次。</p>
+      <p>{{ responsibilityText }} 发布时还会校验教师授课资格、容量和周次；选修课可不关联行政班。</p>
     </section>
 
     <section class="data-card">
@@ -681,7 +681,7 @@ onMounted(async () => {
         </el-table-column>
         <el-table-column prop="termName" label="开课学期" min-width="180" />
         <el-table-column label="授课教师" min-width="130"><template #default="{ row }">{{ row.teacherNames.join('、') || '未安排' }}</template></el-table-column>
-        <el-table-column label="行政班" min-width="150"><template #default="{ row }">{{ row.classNames.join('、') || '未关联' }}</template></el-table-column>
+        <el-table-column label="行政班" min-width="150"><template #default="{ row }">{{ row.classNames.join('、') || '开放选课' }}</template></el-table-column>
         <el-table-column label="人数 / 容量" width="105"><template #default="{ row }">{{ row.studentCount }} / {{ row.capacity }}</template></el-table-column>
         <el-table-column label="周次" width="105"><template #default="{ row }">{{ row.startWeek }}—{{ row.endWeek }} 周</template></el-table-column>
         <el-table-column label="状态" width="90"><template #default="{ row }"><span class="table-status" :class="{ off: row.status === 'Closed' }">{{ statusLabels[row.status] }}</span></template></el-table-column>
@@ -768,7 +768,7 @@ onMounted(async () => {
             <el-option v-for="item in selectedTeachers" :key="item.id" :label="item.name" :value="item.id" />
           </el-select>
         </el-form-item>
-        <el-form-item label="关联行政班">
+        <el-form-item label="关联行政班（选修课可留空）">
           <div class="class-picker">
             <div class="option-filter-grid classes">
               <el-input v-model="manualClassFilters.keyword" clearable placeholder="班级代码、名称或专业" />