diff --git a/apps/web/src/modules/academe/CooperationCase/Timer.tsx b/apps/web/src/modules/academe/CooperationCase/Timer.tsx
index 594d1eb826..7eaf2fcf7a 100644
--- a/apps/web/src/modules/academe/CooperationCase/Timer.tsx
+++ b/apps/web/src/modules/academe/CooperationCase/Timer.tsx
@@ -1,4 +1,4 @@
-import React, { useState, useEffect } from 'react';
+import React, { useState, useEffect, useRef } from 'react';
 import { Progress } from 'antd';
 
 const Timer = ({
@@ -12,22 +12,30 @@ const Timer = ({
 }) => {
   const [progress, setProgress] = useState(0);
 
+  // setActiveFun 存 ref：父组件传的 inline 闭包每次渲染都是新引用，
+  // 放在 effect deps 里导致 interval 频繁重建。
+  const activeFunRef = useRef(setActiveFun);
+  activeFunRef.current = setActiveFun;
+
   useEffect(() => {
     const interval = setInterval(() => {
       !stop &&
-        setProgress((prevProgress) => {
-          if (prevProgress >= 101) {
-            setActiveFun();
-            return 0;
-          } else {
-            return prevProgress + 10 / time;
-          }
-        });
+        setProgress((prevProgress) =>
+          prevProgress >= 101 ? 0 : prevProgress + 10 / time
+        );
     }, 100);
     return () => {
       clearInterval(interval);
     };
-  }, [stop, time, setActiveFun]);
+  }, [stop, time]);
+
+  // 到达终点在 effect 中推进（updater 必须是纯函数——React 在 StrictMode
+  // 与中断渲染下可能重复调用 updater，其中的 setActiveFun 会双触发）。
+  useEffect(() => {
+    if (progress >= 101) {
+      activeFunRef.current();
+    }
+  }, [progress]);
 
   return (
     <div>