diff --git a/frontend/.env b/frontend/.env
index bcaaf67..b3477ea 100644
--- a/frontend/.env
+++ b/frontend/.env
@@ -1 +1,2 @@
-VITE_APP_ENV='prod'
\ No newline at end of file
+VITE_APP_ENV='prod'
+VITE_APP_VERSION='1.0.1'
\ No newline at end of file
diff --git a/frontend/.env.development b/frontend/.env.development
index b43e393..3213cae 100644
--- a/frontend/.env.development
+++ b/frontend/.env.development
@@ -1 +1,2 @@
-VITE_APP_ENV='dev'
\ No newline at end of file
+VITE_APP_ENV='dev'
+VITE_APP_VERSION='0.9.0'
\ No newline at end of file
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 658e1c7..e566052 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -3,13 +3,16 @@ import { onMounted, computed } from 'vue'
 import { useRoute } from 'vue-router'
 import { ConfigProvider } from 'ant-design-vue'
 import { useTheme } from './composables/useTheme.ts'
+import { useUpdateChecker } from './composables/useUpdateChecker.ts'
 import AppLayout from './components/AppLayout.vue'
 import TitleBar from './components/TitleBar.vue'
+import UpdateModal from './components/UpdateModal.vue'
 import zhCN from 'ant-design-vue/es/locale/zh_CN'
 import { logger } from '@/utils/logger'
 
 const route = useRoute()
 const { antdTheme, initTheme } = useTheme()
+const { updateVisible, updateData, onUpdateConfirmed } = useUpdateChecker()
 
 // 判断是否为初始化页面
 const isInitializationPage = computed(() => route.name === 'Initialization')
@@ -35,6 +38,13 @@ onMounted(() => {
       <TitleBar />
       <AppLayout />
     </div>
+    
+    <!-- 全局更新模态框 -->
+    <UpdateModal
+      v-model:visible="updateVisible"
+      :update-data="updateData"
+      @confirmed="onUpdateConfirmed"
+    />
   </ConfigProvider>
 </template>
 
diff --git a/frontend/src/api/models/UpdateCheckIn.ts b/frontend/src/api/models/UpdateCheckIn.ts
index 50588e2..4d66511 100644
--- a/frontend/src/api/models/UpdateCheckIn.ts
+++ b/frontend/src/api/models/UpdateCheckIn.ts
@@ -7,5 +7,9 @@ export type UpdateCheckIn = {
      * 当前前端版本号
      */
     current_version: string;
+    /**
+     * 是否强制拉取更新信息
+     */
+    if_force?: boolean;
 };
 
diff --git a/frontend/src/components/UpdateModal.vue b/frontend/src/components/UpdateModal.vue
index c319fa0..d5d0d0c 100644
--- a/frontend/src/components/UpdateModal.vue
+++ b/frontend/src/components/UpdateModal.vue
@@ -5,10 +5,11 @@
     :width="800"
     :footer="null"
     :mask-closable="false"
+    :z-index="9999"
     class="update-modal"
   >
 
-  <div v-if="hasUpdate" class="update-container">
+  <div class="update-container">
       <!-- 更新内容展示 -->
       <div class="update-content">
         <div
@@ -21,7 +22,7 @@
       <!-- 操作按钮 -->
       <div class="update-footer">
         <div class="update-actions">
-          <a-button v-if="!downloading && !downloaded" @click="visible = false">暂不更新</a-button>
+          <a-button v-if="!downloading && !downloaded" @click="handleCancel">暂不更新</a-button>
           <a-button v-if="!downloading && !downloaded" type="primary" @click="downloadUpdate">
             下载更新
           </a-button>
@@ -40,19 +41,43 @@
 </template>
 
 <script setup lang="ts">
-import { onMounted, ref } from 'vue'
+import { computed, ref, watch } from 'vue'
 import { message } from 'ant-design-vue'
 import MarkdownIt from 'markdown-it'
 import { Service } from '@/api/services/Service.ts'
 
-const visible = ref(false)
+// Props 定义
+interface Props {
+  visible: boolean
+  updateData: Record<string, string[]>
+}
+
+const props = defineProps<Props>()
+
+// Emits 定义
+const emit = defineEmits<{
+  confirmed: []
+  'update:visible': [value: boolean]
+}>()
+
+// 内部状态
 const hasUpdate = ref(false)
 const downloading = ref(false)
 const downloaded = ref(false)
 const installing = ref(false)
-const updateContent = ref("")
 const latestVersion = ref("")
 
+// 计算属性 - 响应式地接收外部 visible 状态
+const visible = computed({
+  get: () => props.visible,
+  set: (value: boolean) => emit('update:visible', value)
+})
+
+// 计算属性 - 转换 updateData 为 markdown
+const updateContent = computed(() => {
+  return updateInfoToMarkdown(props.updateData, latestVersion.value, '更新内容')
+})
+
 // markdown 渲染器
 const md = new MarkdownIt({ html: true, linkify: true, typographer: true })
 const renderMarkdown = (content: string) => md.render(content)
@@ -105,28 +130,35 @@ function updateInfoToMarkdown(
   return lines.join('\n')
 }
 
-// 初始化弹窗流程
-const initUpdateCheck = async () => {
-  try {
-    const version = import.meta.env.VITE_APP_VERSION || '0.0.0'
-    const response = await Service.checkUpdateApiUpdateCheckPost({ current_version: version })
-
-    if (response.code === 200 && response.if_need_update) {
-      hasUpdate.value = true
-      latestVersion.value = response.latest_version || ''
-      // ✅ 核心修改：把对象转成 Markdown 再给渲染器
-      updateContent.value = updateInfoToMarkdown(
-        response.update_info,
-        response.latest_version,
-        '更新内容'
-      )
-      visible.value = true
+// 初始化时设置 hasUpdate
+const initializeModal = () => {
+  if (props.updateData && Object.keys(props.updateData).length > 0) {
+    hasUpdate.value = true
+    // 从 updateData 中提取版本信息（如果有的话）
+    const versionInfo = Object.values(props.updateData).flat().find(item => 
+      typeof item === 'string' && item.includes('版本')
+    )
+    if (versionInfo) {
+      const versionMatch = versionInfo.match(/v?(\d+\.\d+\.\d+)/)
+      if (versionMatch) {
+        latestVersion.value = versionMatch[1]
+      }
     }
-  } catch (err) {
-    console.error('检查更新失败:', err)
   }
 }
 
+// 监听 props 变化
+watch(() => props.updateData, () => {
+  initializeModal()
+}, { immediate: true })
+
+// 监听 visible 变化
+watch(() => props.visible, (newVisible) => {
+  if (newVisible && props.updateData && Object.keys(props.updateData).length > 0) {
+    hasUpdate.value = true
+  }
+}, { immediate: true })
+
 // 下载更新
 const downloadUpdate = async () => {
   downloading.value = true
@@ -134,6 +166,7 @@ const downloadUpdate = async () => {
     const res = await Service.downloadUpdateApiUpdateDownloadPost()
     if (res.code === 200) {
       downloaded.value = true
+      message.success('下载完成')
     } else {
       message.error(res.message || '下载失败')
     }
@@ -153,6 +186,7 @@ const installUpdate = async () => {
     if (res.code === 200) {
       message.success('安装启动')
       visible.value = false
+      emit('confirmed')
     } else {
       message.error(res.message || '安装失败')
     }
@@ -164,9 +198,11 @@ const installUpdate = async () => {
   }
 }
 
-onMounted(() => {
-  initUpdateCheck()
-})
+// 关闭弹窗
+const handleCancel = () => {
+  visible.value = false
+  emit('confirmed')
+}
 
 </script>
 
diff --git a/frontend/src/composables/useUpdateChecker.ts b/frontend/src/composables/useUpdateChecker.ts
new file mode 100644
index 0000000..25a9440
--- /dev/null
+++ b/frontend/src/composables/useUpdateChecker.ts
@@ -0,0 +1,117 @@
+import { ref, onMounted, onUnmounted } from 'vue'
+import { Service } from '@/api'
+import { message } from 'ant-design-vue'
+
+// 获取版本号，优先使用环境变量，否则使用一个测试版本
+const version = (import.meta as any).env.VITE_APP_VERSION || '1.0.0'
+
+// 全局状态 - 在所有组件间共享
+const updateVisible = ref(false)
+const updateData = ref<Record<string, string[]>>({})
+
+// 定时器相关 - 参考顶栏TitleBar.vue的实现
+const POLL_MS = 4 * 60 * 60 * 1000 // 4小时
+let updateCheckTimer: NodeJS.Timeout | null = null
+const isPolling = ref(false)
+
+// 防止重复弹出的状态
+let lastShownVersion: string | null = null
+
+export function useUpdateChecker() {
+  
+  // 执行一次更新检查 - 完全参考顶栏的 pollOnce 逻辑
+  const pollOnce = async () => {
+    if (isPolling.value) return
+    isPolling.value = true
+    
+    try {
+      const response = await Service.checkUpdateApiUpdateCheckPost({
+        current_version: version,
+        if_force: false, // 定时检查不强制获取，和顶栏一致
+      })
+      
+      if (response.code === 200) {
+        if (response.if_need_update) {
+          // 检查是否已经有更新弹窗在显示，避免重复弹出
+          if (updateVisible.value) {
+            return
+          }
+          
+          // 检查是否为同一版本，避免同一版本重复弹出
+          if (lastShownVersion === response.latest_version) {
+            return
+          }
+          
+          updateData.value = response.update_info
+          updateVisible.value = true
+          lastShownVersion = response.latest_version // 记录已显示的版本
+        }
+      }
+    } catch (error: any) {
+      console.error('[useUpdateChecker] 定时更新检查失败:', error?.message)
+    } finally {
+      isPolling.value = false
+    }
+  }
+
+  // 手动检查更新（用于设置页面按钮）
+  const checkUpdate = async (silent = false, forceCheck = false) => {
+    try {
+      const response = await Service.checkUpdateApiUpdateCheckPost({
+        current_version: version,
+        if_force: forceCheck,
+      })
+      
+      if (response.code === 200) {
+        if (response.if_need_update) {
+          updateData.value = response.update_info
+          updateVisible.value = true
+        } else {
+          if (!silent) {
+            message.success('暂无更新~')
+          }
+        }
+      } else {
+        if (!silent) {
+          message.error(response.message || '获取更新失败')
+        }
+      }
+    } catch (error: any) {
+      console.error('[useUpdateChecker] 手动更新检查失败:', error?.message)
+      if (!silent) {
+        message.error('获取更新失败！')
+      }
+    }
+  }
+
+  // 确认回调
+  const onUpdateConfirmed = () => {
+    updateVisible.value = false
+  }
+
+  // 组件挂载时启动检查器 - 参考顶栏的 onMounted 逻辑
+  onMounted(async () => {
+    // 延迟3秒后再执行首次检查，确保后端已经完全启动
+    setTimeout(async () => {
+      await pollOnce()
+    }, 3000)
+    
+    // 每 4 小时检查一次更新
+    updateCheckTimer = setInterval(pollOnce, POLL_MS)
+  })
+
+  // 组件卸载时清理定时器 - 参考顶栏的 onBeforeUnmount 逻辑
+  onUnmounted(() => {
+    if (updateCheckTimer) {
+      clearInterval(updateCheckTimer)
+      updateCheckTimer = null
+    }
+  })
+
+  return {
+    updateVisible,
+    updateData,
+    checkUpdate,
+    onUpdateConfirmed
+  }
+}
diff --git a/frontend/src/views/Home.vue b/frontend/src/views/Home.vue
index b509f9d..3f886d7 100644
--- a/frontend/src/views/Home.vue
+++ b/frontend/src/views/Home.vue
@@ -25,13 +25,6 @@
     @confirmed="onNoticeConfirmed"
   />
 
-  <!-- 更新模态框 -->
-  <UpdateModal
-    v-model:visible="updateVisible"
-    :update-data="updateData"
-    @confirmed="onUpdateConfirmed"
-  />
-
   <div class="content">
     <!-- 当期活动关卡 -->
     <a-card
@@ -253,7 +246,6 @@ import { Service } from '@/api/services/Service'
 import NoticeModal from '@/components/NoticeModal.vue'
 import dayjs from 'dayjs'
 import { API_ENDPOINTS } from '@/config/mirrors.ts'
-import UpdateModal from '@/components/UpdateModal.vue'
 
 interface ActivityInfo {
   Tip: string
@@ -308,11 +300,6 @@ const noticeVisible = ref(false)
 const noticeData = ref<Record<string, string>>({})
 const noticeLoading = ref(false)
 
-// 更新相关
-const version = import.meta.env.VITE_APP_VERSION || '获取版本失败！'
-const updateVisible = ref(false)
-const updateData = ref<Record<string, string[]>>({})
-
 // 获取当前活动信息
 const currentActivity = computed(() => {
   if (!activityData.value.length) return null
@@ -492,35 +479,9 @@ const showNotice = async () => {
   }
 }
 
-const checkUpdate = async () => {
-  try {
-    const response = await Service.checkUpdateApiUpdateCheckPost({
-      current_version: version,
-    })
-    if (response.code === 200) {
-      if (response.if_need_update) {
-        updateData.value = response.update_info
-        updateVisible.value = true
-      } else {
-      }
-    } else {
-      message.error(response.message || '获取更新失败')
-    }
-  } catch (error) {
-    console.error('获取更新失败:', error)
-    return '获取更新失败！'
-  }
-}
-
-// 确认回调
-const onUpdateConfirmed = () => {
-  updateVisible.value = false
-}
-
 onMounted(() => {
   fetchActivityData()
   fetchNoticeData()
-  checkUpdate()
 })
 </script>
 
@@ -549,11 +510,6 @@ onMounted(() => {
   min-width: 120px;
 }
 
-/* 公告相关样式 */
-.notice-modal {
-  /* 自定义公告模态框样式 */
-}
-
 .activity-card {
   margin-bottom: 24px;
 }
diff --git a/frontend/src/views/Settings.vue b/frontend/src/views/Settings.vue
index 2761e3d..df805c0 100644
--- a/frontend/src/views/Settings.vue
+++ b/frontend/src/views/Settings.vue
@@ -221,6 +221,7 @@ const checkUpdate = async () => {
   try {
     const response = await Service.checkUpdateApiUpdateCheckPost({
       current_version: version,
+      if_force: true, // 手动检查强制获取最新信息
     })
     if (response.code === 200) {
       if (response.if_need_update) {
@@ -234,7 +235,7 @@ const checkUpdate = async () => {
     }
   } catch (error) {
     console.error('获取更新失败:', error)
-    return '获取更新失败！'
+    message.error('获取更新失败！')
   }
 }