diff --git a/db/task_db.py b/db/task_db.py
index 5396e91..6509fee 100644
--- a/db/task_db.py
+++ b/db/task_db.py
@@ -183,8 +183,17 @@ class TaskDBOperator(BaseDBOperator):
         Returns:
             是否删除成功
         """
-        sql = "DELETE FROM t_push_tasks WHERE task_id = %s"
-        return self.execute_update(sql, (task_id,))
+        try:
+            # 先删除任务相关的日志
+            delete_logs_sql = "DELETE FROM t_push_task_logs WHERE task_id = %s"
+            self.execute_update(delete_logs_sql, (task_id,))
+            
+            # 然后删除任务
+            delete_task_sql = "DELETE FROM t_push_tasks WHERE task_id = %s"
+            return self.execute_update(delete_task_sql, (task_id,))
+        except Exception as e:
+            logger.error(f"删除任务失败: {e}")
+            return False
 
     def get_scheduled_tasks(self) -> List[Dict]:
         """获取待执行的任务