diff --git a/apps/web/src/pages/generate/components/material/ManualMaterialList.tsx b/apps/web/src/pages/generate/components/material/ManualMaterialList.tsx
index faafc7518..a067e1098 100644
--- a/apps/web/src/pages/generate/components/material/ManualMaterialList.tsx
+++ b/apps/web/src/pages/generate/components/material/ManualMaterialList.tsx
@@ -25,8 +25,12 @@ const ManualMaterialList: React.FC<ManualMaterialListProps> = ({
 
   const handleVideoMouseEnter = useCallback((e: React.MouseEvent<HTMLVideoElement>) => {
     const video = e.currentTarget
-    // 暂停之前正在播放的视频
-    if (activeVideoRef.current && activeVideoRef.current !== video) {
+    // 暂停之前正在播放的视频（检查是否仍在 DOM 中）
+    if (
+      activeVideoRef.current &&
+      activeVideoRef.current !== video &&
+      document.body.contains(activeVideoRef.current)
+    ) {
       activeVideoRef.current.pause()
       activeVideoRef.current.currentTime = 0
     }