diff --git a/apps/worker/worker_app/tasks/generation.py b/apps/worker/worker_app/tasks/generation.py
index fcfb3ed66..08a67a030 100644
--- a/apps/worker/worker_app/tasks/generation.py
+++ b/apps/worker/worker_app/tasks/generation.py
@@ -15,6 +15,7 @@ from __future__ import annotations
 
 import logging
 import time
+import shutil
 from pathlib import Path
 
 from video_processing.ffmpeg_utils import probe_duration
@@ -731,9 +732,7 @@ def generate_video(self, task_id: str) -> dict:
                 finally:
                     # ── 4.1 清理渲染临时目录（无论上传成功与否都清理）
                     if render_temp_dir:
-                        import shutil as _shutil
-
-                        _shutil.rmtree(render_temp_dir, ignore_errors=True)
+                        shutil.rmtree(render_temp_dir, ignore_errors=True)
                         logger.info("[task_id=%s] 渲染临时目录已清理: %s", task_id, render_temp_dir)
                 # ── 4.5 封面帧持久化 ────────────────────────────────────────────
                 try: