diff --git a/frontend/miniapp/app.js b/frontend/miniapp/app.js
index 1929867..12bd1a4 100644
--- a/frontend/miniapp/app.js
+++ b/frontend/miniapp/app.js
@@ -62,7 +62,7 @@ App({
   onHide: function () {},
   globalData: {
     unread: 0, //未读消息数（tabbar红点共享缓存）
-    unreadFetchedAt: 0, //上次拉取未读数的时间，各 tabBar 实例共用，避免切 Tab 重复请求
+    unreadSeq: 0, //未读数写入序号，用来丢弃过期响应
     appShowAt: 0, //最近一次 App.onShow 的时间
     refreshDemandId: 0, //操作后需要刷新状态的需求ID（跨页面通知列表页）
   },
diff --git a/frontend/miniapp/custom-tab-bar/index.js b/frontend/miniapp/custom-tab-bar/index.js
index 23263b2..340258f 100644
--- a/frontend/miniapp/custom-tab-bar/index.js
+++ b/frontend/miniapp/custom-tab-bar/index.js
@@ -1,5 +1,6 @@
 import TabMenu from './data';
 import { fetchMessageUnreadCount } from '../services/message/fetchMessage';
+
 Component({
   data: {
     active: 0,
@@ -9,7 +10,7 @@ Component({
 
   lifetimes: {
     attached() {
-      // 先用全局缓存渲染，避免切换 tab 时红点闪没。网络请求交给 show，并与其他实例共用节流
+      // 先用全局缓存渲染，避免切换 tab 时红点闪没。网络请求交给 show
       const app = getApp();
       const unread = app && app.globalData ? Number(app.globalData.unread) || 0 : 0;
       if (unread > 0) {
@@ -18,9 +19,13 @@ Component({
     },
   },
 
-  // 当前 tab 显示时刷新。30s 内各实例只发一次请求
+  // 每次显示当前 Tab 时拉一次未读数，停在页面上不再重复请求
   pageLifetimes: {
     show() {
+      const app = getApp();
+      if (app && app.globalData) {
+        app.globalData.unreadOwner = this;
+      }
       this.refreshUnread();
     },
   },
@@ -47,11 +52,10 @@ Component({
     },
 
     /**
-     * 从服务端拉取未读消息数
-     * 未登录时不显示红点。节流记在 globalData，切换 Tab 新建的 tabBar 实例也会共用
-     * 30s 内只发一次；消息页改未读数走 setUnread，不走这里
+     * 从服务端拉取未读消息数。未登录时不显示红点
+     * 进行中的请求不重复发；消息页 setUnread 会作废更早的响应，避免红点被旧结果盖回去
      */
-    refreshUnread(force = false) {
+    refreshUnread() {
       const app = getApp();
       const token = (wx.$util && wx.$util.getToken && wx.$util.getToken()) || '';
       if (!token) {
@@ -61,32 +65,34 @@ Component({
         }
         return;
       }
-      const now = Date.now();
-      const last = app && app.globalData ? Number(app.globalData.unreadFetchedAt) || 0 : 0;
-      if (!force && now - last < 30000) {
-        if (app && app.globalData) {
-          this.setData({ unread: Number(app.globalData.unread) || 0 });
-        }
-        return;
-      }
       if (app && app.globalData && app.globalData.unreadFetching) {
+        this.setData({ unread: Number(app.globalData.unread) || 0 });
         return;
       }
+      const seq = ((app && app.globalData && app.globalData.unreadSeq) || 0) + 1;
       if (app && app.globalData) {
+        app.globalData.unreadSeq = seq;
         app.globalData.unreadFetching = true;
-        app.globalData.unreadFetchedAt = now;
       }
       const done = () => {
-        if (app && app.globalData) {
+        if (app && app.globalData && app.globalData.unreadSeq === seq) {
           app.globalData.unreadFetching = false;
         }
       };
       fetchMessageUnreadCount().then((res) => {
+        if (app && app.globalData && app.globalData.unreadSeq !== seq) {
+          return;
+        }
         if (res.code == 1) {
           const unread = Number(res.data?.unread_count) || 0;
           this.setData({ unread });
           if (app && app.globalData) {
             app.globalData.unread = unread;
+            // 请求返回时人可能已经切到另一个 Tab，把红点写到正在显示的那一份
+            const owner = app.globalData.unreadOwner;
+            if (owner && owner !== this && typeof owner.setData === 'function') {
+              owner.setData({ unread });
+            }
           }
         }
       }).catch(() => {}).then(done, done);
@@ -101,7 +107,8 @@ Component({
       const app = getApp();
       if (app && app.globalData) {
         app.globalData.unread = unread;
-        app.globalData.unreadFetchedAt = Date.now();
+        app.globalData.unreadSeq = (app.globalData.unreadSeq || 0) + 1;
+        app.globalData.unreadFetching = false;
       }
     },
   },