diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 1373aed..7037c16 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -61,6 +61,7 @@ public class TaskService {
     private final SystemConfigService systemConfigService;
     private final com.designhub.mapper.DepartmentMapper departmentMapper;
     private final com.designhub.util.WorkHoursCalculator workHoursCalculator;
+    private final com.designhub.mapper.DelayPenaltyRecordMapper delayPenaltyRecordMapper;
 
     /**
      * 创建任务
@@ -3440,14 +3441,27 @@ public class TaskService {
             }
         }
         
-        // 3. 删除所有子任务
+        // 3. 删除延误扣分记录
+        try {
+            int deletedRecords = delayPenaltyRecordMapper.delete(
+                new LambdaQueryWrapper<com.designhub.entity.DelayPenaltyRecord>()
+                    .eq(com.designhub.entity.DelayPenaltyRecord::getTaskId, taskId)
+            );
+            if (deletedRecords > 0) {
+                log.info("已删除 {} 条延误扣分记录", deletedRecords);
+            }
+        } catch (Exception e) {
+            log.warn("删除延误扣分记录失败: {}", e.getMessage());
+        }
+        
+        // 4. 删除所有子任务
         int deletedItems = taskItemMapper.delete(
             new LambdaQueryWrapper<TaskItem>()
                 .eq(TaskItem::getTaskId, taskId)
         );
         log.info("已删除 {} 个子任务", deletedItems);
         
-        // 4. 删除主任务
+        // 5. 删除主任务
         taskMapper.deleteById(taskId);
         log.info("已删除主任务: taskNo={}, taskId={}", taskNo, taskId);
     }