diff --git a/src/Jiaowu.Api/Controllers/TimetablesController.cs b/src/Jiaowu.Api/Controllers/TimetablesController.cs
index cad8ef4..dbe6340 100644
--- a/src/Jiaowu.Api/Controllers/TimetablesController.cs
+++ b/src/Jiaowu.Api/Controllers/TimetablesController.cs
@@ -45,6 +45,30 @@ public sealed class TimetablesController(
         CancellationToken cancellationToken) =>
          BuildTimetableAsync(classId, academicTermId, null, cancellationToken);
 
+    [HttpGet("my-class")]
+    [Authorize(Roles = SystemRoles.Student)]
+    public async Task<ActionResult> GetMyClass(CancellationToken cancellationToken)
+    {
+        if (!Guid.TryParse(User.FindFirstValue(ClaimTypes.NameIdentifier), out var userId))
+            return Unauthorized();
+
+        var administrativeClassId = await db.Students.AsNoTracking()
+            .Where(x => x.UserId == userId)
+            .Select(x => (Guid?)x.AdministrativeClassId)
+            .FirstOrDefaultAsync(cancellationToken);
+        if (!administrativeClassId.HasValue)
+        {
+            return Conflict(new ProblemDetails
+            {
+                Title = "档案未关联",
+                Detail = "当前登录账号没有关联学生档案，请联系教务管理员。",
+                Status = StatusCodes.Status409Conflict
+            });
+        }
+
+        return Ok(new { AdministrativeClassId = administrativeClassId.Value });
+    }
+
     [HttpGet("teachers/{teacherId:guid}")]
     [AllowAnonymous]
     public async Task<ActionResult> GetTeacherTimetable(
diff --git a/web/src/views/TimetableView.vue b/web/src/views/TimetableView.vue
index 4f326c3..03fabb1 100644
--- a/web/src/views/TimetableView.vue
+++ b/web/src/views/TimetableView.vue
@@ -403,7 +403,11 @@ async function loadPublicOptions() {
   termId.value = defaultAcademicTermId(data.terms)
     ?? data.terms.find((item: any) => item.hasPublishedTimetable)?.id
     ?? ''
-  const initialClass = data.classes.find((item: any) => item.hasPublishedTimetable)
+  const studentClassId = auth.user?.roles.includes('Student')
+    ? (await http.get('/timetables/my-class')).data.administrativeClassId
+    : undefined
+  const initialClass = data.classes.find((item: any) => item.id === studentClassId)
+    ?? data.classes.find((item: any) => item.hasPublishedTimetable)
     ?? data.classes[0]
   classId.value = initialClass?.id ?? ''
   setClassFilters(initialClass)