diff --git a/src/main/java/com/huertian/jinduguanli/service/LessonTaskService.java b/src/main/java/com/huertian/jinduguanli/service/LessonTaskService.java
index 6ef0100..8e5186b 100644
--- a/src/main/java/com/huertian/jinduguanli/service/LessonTaskService.java
+++ b/src/main/java/com/huertian/jinduguanli/service/LessonTaskService.java
@@ -51,7 +51,7 @@ public class LessonTaskService {
     }
 
     @Transactional
-    @CacheEvict(value = {"lessonTasks", "lessonTask"}, allEntries = true)
+    @CacheEvict(value = { "lessonTasks", "lessonTask" }, allEntries = true)
     public LessonTask create(LessonTaskRequest request) {
         logger.info("开始创建课程任务 - 课程名称: {}, 小课名称: {}, 用户ID: {}",
                 request.getCourseName(), request.getMicroLessonName(), request.getUserId());
@@ -65,7 +65,7 @@ public class LessonTaskService {
     }
 
     @Transactional
-    @CacheEvict(value = {"lessonTasks", "lessonTask"}, allEntries = true)
+    @CacheEvict(value = { "lessonTasks", "lessonTask" }, allEntries = true)
     public LessonTask update(Long id, LessonTaskRequest request) {
         logger.info("开始更新课程任务 - 任务ID: {}, 进度状态: {}", id, request.getProgressStatus());
         LessonTask task = findById(id);
@@ -76,17 +76,34 @@ public class LessonTaskService {
             // 根据进度状态更新时间戳
             long currentTime = System.currentTimeMillis() / 1000;
             switch (request.getProgressStatus()) {
+                case 0: // 初始状态
+                    task.setScriptUploadTime(null);
+                    task.setScriptConfirmTime(null);
+                    task.setVideoCaptureTime(null);
+                    task.setVideoConfirmTime(null);
+                    task.setFinishTime(null);
+                    break;
                 case 1: // 脚本上传
                     task.setScriptUploadTime(currentTime);
+                    task.setScriptConfirmTime(null);
+                    task.setVideoCaptureTime(null);
+                    task.setVideoConfirmTime(null);
+                    task.setFinishTime(null);
                     break;
                 case 2: // 脚本确认
                     task.setScriptConfirmTime(currentTime);
+                    task.setVideoCaptureTime(null);
+                    task.setVideoConfirmTime(null);
+                    task.setFinishTime(null);
                     break;
                 case 3: // 视频拍摄
                     task.setVideoCaptureTime(currentTime);
+                    task.setVideoConfirmTime(null);
+                    task.setFinishTime(null);
                     break;
                 case 4: // 视频确认
                     task.setVideoConfirmTime(currentTime);
+                    task.setFinishTime(null);
                     break;
                 case 5: // 任务完成
                     task.setFinishTime(currentTime);
@@ -113,7 +130,7 @@ public class LessonTaskService {
     }
 
     @Transactional
-    @CacheEvict(value = {"lessonTasks", "lessonTask"}, allEntries = true)
+    @CacheEvict(value = { "lessonTasks", "lessonTask" }, allEntries = true)
     public void delete(Long id) {
         logger.info("开始删除课程任务 - 任务ID: {}", id);
         if (!lessonTaskRepository.existsById(id)) {
@@ -133,7 +150,8 @@ public class LessonTaskService {
      */
     public Page<LessonTaskDTO> findByDepartmentIdAndNormalUser(Long departmentId, Pageable pageable) {
         logger.info("查询部门正常用户的课程任务，部门ID: {}", departmentId);
-        Page<java.util.Map<String, Object>> result = lessonTaskRepository.findByDepartmentIdAndNormalUserWithUsername(departmentId, pageable);
+        Page<java.util.Map<String, Object>> result = lessonTaskRepository
+                .findByDepartmentIdAndNormalUserWithUsername(departmentId, pageable);
 
         return result.map(map -> {
             LessonTask lessonTask = (LessonTask) map.get("lessonTask");