diff --git a/frontend_nuxt/app.vue b/frontend_nuxt/app.vue
index 8eab548cf..6a429d5ae 100644
--- a/frontend_nuxt/app.vue
+++ b/frontend_nuxt/app.vue
@@ -1,6 +1,6 @@
 <template>
   <div id="app">
-    <div class="header-container">
+    <div v-if="!isFloatMode" class="header-container">
       <HeaderComponent
         ref="header"
         @toggle-menu="menuVisible = !menuVisible"
@@ -9,19 +9,28 @@
     </div>
 
     <div class="main-container">
-      <div class="menu-container" v-click-outside="handleMenuOutside">
+      <div v-if="!isFloatMode" class="menu-container" v-click-outside="handleMenuOutside">
         <MenuComponent :visible="!hideMenu && menuVisible" @item-click="menuVisible = false" />
       </div>
-      <div class="content" :class="{ 'menu-open': menuVisible && !hideMenu }">
+      <div
+        class="content"
+        :class="{ 'menu-open': menuVisible && !hideMenu && !isFloatMode }"
+        :style="isFloatMode ? { paddingTop: '0px', minHeight: '100vh' } : {}"
+      >
         <NuxtPage keepalive />
       </div>
 
-      <div v-if="showNewPostIcon && isMobile" class="app-new-post-icon" @click="goToNewPost">
+      <div
+        v-if="showNewPostIcon && isMobile && !isFloatMode"
+        class="app-new-post-icon"
+        @click="goToNewPost"
+      >
         <i class="fas fa-edit"></i>
       </div>
     </div>
     <GlobalPopups />
     <ConfirmDialog />
+    <MessageFloatWindow v-if="!isFloatMode" />
   </div>
 </template>
 
@@ -30,6 +39,7 @@ import HeaderComponent from '~/components/HeaderComponent.vue'
 import MenuComponent from '~/components/MenuComponent.vue'
 import GlobalPopups from '~/components/GlobalPopups.vue'
 import ConfirmDialog from '~/components/ConfirmDialog.vue'
+import MessageFloatWindow from '~/components/MessageFloatWindow.vue'
 import { useIsMobile } from '~/utils/screen'
 
 const isMobile = useIsMobile()
@@ -52,6 +62,7 @@ const hideMenu = computed(() => {
 })
 
 const header = useTemplateRef('header')
+const isFloatMode = computed(() => useRoute().query.float !== undefined)
 
 onMounted(() => {
   if (typeof window !== 'undefined') {
diff --git a/frontend_nuxt/components/MessageFloatWindow.vue b/frontend_nuxt/components/MessageFloatWindow.vue
new file mode 100644
index 000000000..c3866a672
--- /dev/null
+++ b/frontend_nuxt/components/MessageFloatWindow.vue
@@ -0,0 +1,65 @@
+<template>
+  <div v-if="floatRoute" class="message-float-window">
+    <iframe :src="iframeSrc" frameborder="0"></iframe>
+    <div class="float-actions">
+      <i class="fas fa-expand" @click="expand"></i>
+    </div>
+  </div>
+</template>
+
+<script setup>
+const floatRoute = useState('messageFloatRoute')
+
+const iframeSrc = computed(() => {
+  if (!floatRoute.value) return ''
+  return floatRoute.value + (floatRoute.value.includes('?') ? '&' : '?') + 'float=1'
+})
+
+function expand() {
+  if (!floatRoute.value) return
+  const target = floatRoute.value
+  floatRoute.value = null
+  navigateTo(target)
+}
+</script>
+
+<style scoped>
+.message-float-window {
+  position: fixed;
+  bottom: 0;
+  right: 0;
+  width: 400px;
+  height: 60vh;
+  max-height: 90vh;
+  background-color: var(--background-color);
+  border: 1px solid var(--normal-border-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+  z-index: 2000;
+  display: flex;
+  flex-direction: column;
+}
+
+.message-float-window iframe {
+  width: 100%;
+  flex: 1;
+}
+
+.float-actions {
+  position: absolute;
+  top: 4px;
+  right: 8px;
+}
+
+.float-actions i {
+  cursor: pointer;
+}
+
+@media (max-width: 480px) {
+  .message-float-window {
+    width: 100%;
+    right: 0;
+    left: 0;
+    height: 100vh;
+  }
+}
+</style>
diff --git a/frontend_nuxt/pages/message-box/[id].vue b/frontend_nuxt/pages/message-box/[id].vue
index 0ecf3e5a4..7dd6856d2 100644
--- a/frontend_nuxt/pages/message-box/[id].vue
+++ b/frontend_nuxt/pages/message-box/[id].vue
@@ -1,12 +1,17 @@
 <template>
-  <div class="chat-container">
+  <div class="chat-container" :class="{ float: isFloatMode }">
     <div v-if="!loading" class="chat-header">
-      <NuxtLink to="/message-box" class="back-button">
-        <i class="fas fa-arrow-left"></i>
-      </NuxtLink>
-      <h2 class="participant-name">
-        {{ isChannel ? conversationName : otherParticipant?.username }}
-      </h2>
+      <div class="header-main">
+        <NuxtLink to="/message-box" class="back-button">
+          <i class="fas fa-arrow-left"></i>
+        </NuxtLink>
+        <h2 class="participant-name">
+          {{ isChannel ? conversationName : otherParticipant?.username }}
+        </h2>
+      </div>
+      <div v-if="!isFloatMode" class="header-actions" @click="minimize">
+        <i class="fas fa-window-minimize"></i>
+      </div>
     </div>
 
     <div class="messages-list" ref="messagesListEl">
@@ -115,6 +120,8 @@ const loadingMore = ref(false)
 let scrollInterval = null
 const conversationName = ref('')
 const isChannel = ref(false)
+const isFloatMode = computed(() => route.query.float !== undefined)
+const floatRoute = useState('messageFloatRoute')
 const replyTo = ref(null)
 
 const hasMoreMessages = computed(() => currentPage.value < totalPages.value - 1)
@@ -179,7 +186,7 @@ async function fetchMessages(page = 0) {
       ...item,
       src: item.sender.avatar,
       iconClick: () => {
-        navigateTo(`/users/${item.sender.id}`, { replace: true })
+        openUser(item.sender.id)
       },
     }))
 
@@ -260,7 +267,7 @@ async function sendMessage(content, clearInput) {
       ...newMessage,
       src: newMessage.sender.avatar,
       iconClick: () => {
-        navigateTo(`/users/${newMessage.sender.id}`, { replace: true })
+        openUser(newMessage.sender.id)
       },
     })
     clearInput()
@@ -347,7 +354,7 @@ watch(isConnected, (newValue) => {
             ...message,
             src: message.sender.avatar,
             iconClick: () => {
-              navigateTo(`/users/${message.sender.id}`, { replace: true })
+              openUser(message.sender.id)
             },
           })
           // 实时收到消息时自动标记为已读
@@ -401,6 +408,19 @@ onUnmounted(() => {
   }
   disconnect()
 })
+
+function minimize() {
+  floatRoute.value = route.fullPath
+  navigateTo('/')
+}
+
+function openUser(id) {
+  if (isFloatMode.value && typeof window !== 'undefined') {
+    window.top.location.href = `/users/${id}`
+  } else {
+    navigateTo(`/users/${id}`, { replace: true })
+  }
+}
 </script>
 
 <style scoped>
@@ -413,8 +433,13 @@ onUnmounted(() => {
   position: relative;
 }
 
+.chat-container.float {
+  height: 100vh;
+}
+
 .chat-header {
   display: flex;
+  justify-content: space-between;
   position: sticky;
   top: 0;
   z-index: 100;
@@ -425,6 +450,15 @@ onUnmounted(() => {
   backdrop-filter: var(--blur-10);
 }
 
+.header-main {
+  display: flex;
+  align-items: center;
+}
+
+.header-actions i {
+  cursor: pointer;
+}
+
 .back-button {
   font-size: 18px;
   color: var(--text-color-primary);
diff --git a/frontend_nuxt/pages/message-box/index.vue b/frontend_nuxt/pages/message-box/index.vue
index 17f14587c..2b016e81c 100644
--- a/frontend_nuxt/pages/message-box/index.vue
+++ b/frontend_nuxt/pages/message-box/index.vue
@@ -1,5 +1,8 @@
 <template>
   <div class="messages-container">
+    <div v-if="!isFloatMode" class="float-control">
+      <i class="fas fa-window-minimize" @click="minimize"></i>
+    </div>
     <div class="tabs">
       <div :class="['tab', { active: activeTab === 'messages' }]" @click="activeTab = 'messages'">
         站内信
@@ -114,8 +117,8 @@
 </template>
 
 <script setup>
+import { ref, onUnmounted, watch, onActivated, computed } from 'vue'
 import { useRoute } from 'vue-router'
-import { ref, onUnmounted, watch, onActivated } from 'vue'
 import { getToken, fetchCurrentUser } from '~/utils/auth'
 import { toast } from '~/main'
 import { useWebSocket } from '~/composables/useWebSocket'
@@ -143,6 +146,9 @@ let subscription = null
 const activeTab = ref('messages')
 const channels = ref([])
 const loadingChannels = ref(false)
+const route = useRoute()
+const isFloatMode = computed(() => route.query.float !== undefined)
+const floatRoute = useState('messageFloatRoute')
 
 async function fetchConversations() {
   const token = getToken()
@@ -275,12 +281,26 @@ onUnmounted(() => {
 function goToConversation(id) {
   navigateTo(`/message-box/${id}`)
 }
+
+function minimize() {
+  floatRoute.value = route.fullPath
+  navigateTo('/')
+}
 </script>
 
 <style scoped>
 .messages-container {
 }
 
+.float-control {
+  text-align: right;
+  padding: 8px 12px;
+}
+
+.float-control i {
+  cursor: pointer;
+}
+
 .tabs {
   display: flex;
   border-bottom: 1px solid var(--normal-border-color);