diff --git a/module/download_stat.py b/module/download_stat.py
index a48a66e..40384d2 100644
--- a/module/download_stat.py
+++ b/module/download_stat.py
@@ -59,6 +59,9 @@ def get_download_result() -> dict:
 
 def get_total_download_speed() -> int:
     """get total download speed"""
+    # 超过 2 秒没有新数据，视为速度为 0（防止旧速度值残留显示）
+    if time.time() - _last_download_time > 2.0:
+        return 0
     return _total_download_speed