diff --git a/frontend/components/chat/ChatOverlays.vue b/frontend/components/chat/ChatOverlays.vue
index b158bc6..c344ffc 100644
--- a/frontend/components/chat/ChatOverlays.vue
+++ b/frontend/components/chat/ChatOverlays.vue
@@ -1311,7 +1311,7 @@
                     :class="exportScope === 'all' ? 'bg-[#03C160] text-white border-[#03C160]' : 'bg-white border-gray-200 text-gray-700 hover:bg-gray-50'"
                     @click="onExportBatchScopeClick('all')"
                   >
-                    全部 {{ exportContactCounts.total }}
+                    全部 {{ exportTargetsLoading ? '...' : exportContactCounts.total }}
                   </button>
                   <button
                     type="button"
@@ -1319,7 +1319,7 @@
                     :class="exportScope === 'groups' ? 'bg-[#03C160] text-white border-[#03C160]' : 'bg-white border-gray-200 text-gray-700 hover:bg-gray-50'"
                     @click="onExportBatchScopeClick('groups')"
                   >
-                    群聊 {{ exportContactCounts.groups }}
+                    群聊 {{ exportTargetsLoading ? '...' : exportContactCounts.groups }}
                   </button>
                   <button
                     type="button"
@@ -1327,7 +1327,7 @@
                     :class="exportScope === 'singles' ? 'bg-[#03C160] text-white border-[#03C160]' : 'bg-white border-gray-200 text-gray-700 hover:bg-gray-50'"
                     @click="onExportBatchScopeClick('singles')"
                   >
-                    单聊 {{ exportContactCounts.singles }}
+                    单聊 {{ exportTargetsLoading ? '...' : exportContactCounts.singles }}
                   </button>
                   <button
                     type="button"
@@ -1338,6 +1338,8 @@
                     自定义
                   </button>
                 </div>
+                <div v-if="exportTargetsLoading" class="mt-1 text-[11px] text-gray-400">正在同步导出范围...</div>
+                <div v-else-if="exportTargetsError" class="mt-1 text-[11px] text-red-500">{{ exportTargetsError }}</div>
               </div>
 
               <div>
@@ -1432,6 +1434,7 @@
                     <div class="text-sm text-gray-800 truncate">
                       {{ c.name }}
                       <span class="text-xs text-gray-500">{{ c.isGroup ? '（群）' : '' }}</span>
+                      <span v-if="!c.inSessionList" class="ml-1 text-[10px] text-[#03C160]">补充</span>
                     </div>
                     <div class="text-xs text-gray-500 truncate">{{ c.username }}</div>
                   </div>
diff --git a/frontend/composables/chat/useChatExport.js b/frontend/composables/chat/useChatExport.js
index 9b3452c..98147e2 100644
--- a/frontend/composables/chat/useChatExport.js
+++ b/frontend/composables/chat/useChatExport.js
@@ -45,6 +45,10 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
   const exportSearchQuery = ref('')
   const exportListTab = ref('all')
   const exportSelectedUsernames = ref([])
+  const exportTargetContacts = ref([])
+  const exportTargetsLoading = ref(false)
+  const exportTargetsLoaded = ref(false)
+  const exportTargetsError = ref('')
 
   const exportJob = ref(null)
   let exportPollTimer = null
@@ -121,9 +125,35 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
     }, [])
   }
 
+  const normalizeExportTargetContact = (item) => {
+    const username = String(item?.username || '').trim()
+    const name = String(item?.name || item?.displayName || username).trim() || username
+    return {
+      ...item,
+      username,
+      name,
+      displayName: name,
+      avatar: String(item?.avatar || '').trim(),
+      isGroup: item?.isGroup != null ? !!item.isGroup : username.endsWith('@chatroom'),
+      isHidden: !!item?.isHidden,
+      inSessionList: item?.inSessionList == null ? true : !!item.inSessionList
+    }
+  }
+
+  const getLocalExportContacts = () => {
+    return (Array.isArray(contacts.value) ? contacts.value : [])
+      .map(normalizeExportTargetContact)
+      .filter((contact) => !!contact.username)
+  }
+
+  const getExportBaseContacts = () => {
+    if (exportTargetsLoaded.value) return exportTargetContacts.value
+    return getLocalExportContacts()
+  }
+
   const getExportFilteredContacts = ({ tab = exportListTab.value, query = exportSearchQuery.value } = {}) => {
     const normalizedQuery = String(query || '').trim().toLowerCase()
-    let list = Array.isArray(contacts.value) ? contacts.value : []
+    let list = getExportBaseContacts()
 
     const normalizedTab = String(tab || 'all')
     if (normalizedTab === 'groups') list = list.filter((contact) => !!contact?.isGroup)
@@ -142,7 +172,7 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
   })
 
   const exportContactCounts = computed(() => {
-    const list = Array.isArray(contacts.value) ? contacts.value : []
+    const list = getExportBaseContacts()
     const total = list.length
     const groups = list.filter((contact) => !!contact?.isGroup).length
     return { total, groups, singles: total - groups }
@@ -211,6 +241,52 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
     }
   }
 
+  const loadExportTargets = async ({ selectFiltered = false } = {}) => {
+    if (!selectedAccount.value) return
+    const selectedBeforeLoad = normalizeExportSelectedUsernames(exportSelectedUsernames.value)
+    const filteredBeforeLoad = getExportFilteredUsernames(exportListTab.value)
+    const selectedWasCurrentFiltered =
+      filteredBeforeLoad.length > 0 &&
+      filteredBeforeLoad.length === selectedBeforeLoad.length &&
+      filteredBeforeLoad.every((username) => selectedBeforeLoad.includes(username))
+    exportTargetsLoading.value = true
+    exportTargetsError.value = ''
+    try {
+      const response = await api.getChatExportTargets({
+        account: selectedAccount.value,
+        include_hidden: true,
+        include_official: false
+      })
+      const selectedNow = normalizeExportSelectedUsernames(exportSelectedUsernames.value)
+      const filteredNowBeforeLoad = getExportFilteredUsernames(exportListTab.value)
+      const selectedNowMatchesPreloadFilter =
+        filteredBeforeLoad.length > 0 &&
+        filteredBeforeLoad.length === selectedNow.length &&
+        filteredBeforeLoad.every((username) => selectedNow.includes(username))
+      const selectedNowMatchesCurrentFilter =
+        filteredNowBeforeLoad.length > 0 &&
+        filteredNowBeforeLoad.length === selectedNow.length &&
+        filteredNowBeforeLoad.every((username) => selectedNow.includes(username))
+      const targets = Array.isArray(response?.targets) ? response.targets : []
+      exportTargetContacts.value = targets
+        .map(normalizeExportTargetContact)
+        .filter((contact) => !!contact.username)
+      exportTargetsLoaded.value = true
+      if (selectFiltered || selectedWasCurrentFiltered || selectedNowMatchesPreloadFilter || selectedNowMatchesCurrentFilter) {
+        selectExportFilteredContacts(exportListTab.value)
+      }
+    } catch (error) {
+      exportTargetsLoaded.value = false
+      exportTargetContacts.value = []
+      exportTargetsError.value = error?.message || '加载导出范围失败'
+      if (!exportError.value) {
+        exportError.value = `加载导出范围失败：${exportTargetsError.value}`
+      }
+    } finally {
+      exportTargetsLoading.value = false
+    }
+  }
+
   const isDesktopExportRuntime = () => {
     return !!(process.client && window?.wechatDesktop?.chooseDirectory)
   }
@@ -416,6 +492,9 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
   const openExportModal = () => {
     exportModalOpen.value = true
     exportError.value = ''
+    exportTargetsError.value = ''
+    exportTargetsLoaded.value = false
+    exportTargetContacts.value = []
     resetExportSaveFeedback({ resetAutoSavedFor: true })
     exportCancelRequested.value = false
     exportSearchQuery.value = ''
@@ -426,9 +505,7 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
     exportMessageTypes.value = exportMessageTypeOptions.map((item) => item.value)
     exportAutoSavedFor.value = ''
     exportScope.value = selectedContact.value?.username ? 'current' : 'selected'
-    if (!selectedContact.value?.username) {
-      selectExportFilteredContacts('all')
-    }
+    loadExportTargets({ selectFiltered: !selectedContact.value?.username })
   }
 
   const closeExportModal = () => {
@@ -627,6 +704,9 @@ export const useChatExport = ({ api, apiBase, contacts, selectedAccount, selecte
     exportJob,
     exportOverallPercent,
     exportCurrentPercent,
+    exportTargetsLoading,
+    exportTargetsLoaded,
+    exportTargetsError,
     exportFilteredContacts,
     exportContactCounts,
     onExportBatchScopeClick,
diff --git a/frontend/composables/useApi.js b/frontend/composables/useApi.js
index 754f84b..87aa0a0 100644
--- a/frontend/composables/useApi.js
+++ b/frontend/composables/useApi.js
@@ -449,6 +449,15 @@ export const useApi = () => {
     return await request('/chat/exports')
   }
 
+  const getChatExportTargets = async (params = {}) => {
+    const query = new URLSearchParams()
+    if (params && params.account) query.set('account', params.account)
+    if (params && params.include_hidden != null) query.set('include_hidden', String(!!params.include_hidden))
+    if (params && params.include_official != null) query.set('include_official', String(!!params.include_official))
+    const url = '/chat/exports/targets' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url)
+  }
+
   const cancelChatExport = async (exportId) => {
     if (!exportId) throw new Error('Missing exportId')
     return await request(`/chat/exports/${encodeURIComponent(String(exportId))}`, { method: 'DELETE' })
@@ -693,6 +702,7 @@ export const useApi = () => {
     createChatExport,
     getChatExport,
     listChatExports,
+    getChatExportTargets,
     cancelChatExport,
     createSnsExport,
     getSnsExport,
diff --git a/src/wechat_decrypt_tool/chat_export_service.py b/src/wechat_decrypt_tool/chat_export_service.py
index a0b0444..562b3cc 100644
--- a/src/wechat_decrypt_tool/chat_export_service.py
+++ b/src/wechat_decrypt_tool/chat_export_service.py
@@ -43,6 +43,7 @@ from .chat_helpers import (
     _parse_location_message,
     _parse_system_message_content,
     _parse_pat_message,
+    _build_avatar_url,
     _pick_display_name,
     _quote_ident,
     _resolve_account_dir,
@@ -3745,6 +3746,73 @@ def _load_message_backed_export_targets(*, account_dir: Path, seed_usernames: se
     return out
 
 
+def build_chat_export_targets_preview(
+    *,
+    account_dir: Path,
+    include_hidden: bool = True,
+    include_official: bool = False,
+    base_url: str = "",
+) -> dict[str, Any]:
+    targets = _resolve_export_targets(
+        account_dir=account_dir,
+        scope="all",
+        usernames=[],
+        include_hidden=bool(include_hidden),
+        include_official=bool(include_official),
+    )
+    session_rows, session_hidden_by_username = _load_export_session_targets(account_dir)
+    session_usernames = {u for u, _sort_ts in session_rows}
+    contact_rows = _load_contact_rows(account_dir / "contact.db", targets)
+    base = str(base_url or "").rstrip("/")
+
+    conversations: list[dict[str, Any]] = []
+    for u in targets:
+        row = contact_rows.get(u)
+        display_name = _pick_display_name(row, u) if row is not None else u
+        avatar_path = _build_avatar_url(account_dir.name, u)
+        conversations.append(
+            {
+                "username": u,
+                "name": display_name,
+                "displayName": display_name,
+                "isGroup": bool(u.endswith("@chatroom")),
+                "isHidden": bool(int(session_hidden_by_username.get(u) or 0) == 1),
+                "inSessionList": bool(u in session_usernames),
+                "avatar": f"{base}{avatar_path}" if base else avatar_path,
+            }
+        )
+
+    group_count = sum(1 for item in conversations if bool(item.get("isGroup")))
+    return {
+        "status": "success",
+        "account": account_dir.name,
+        "includeHidden": bool(include_hidden),
+        "includeOfficial": bool(include_official),
+        "targets": conversations,
+        "counts": {
+            "total": len(conversations),
+            "groups": group_count,
+            "singles": len(conversations) - group_count,
+        },
+    }
+
+
+def get_chat_export_targets_preview(
+    *,
+    account: Optional[str],
+    include_hidden: bool = True,
+    include_official: bool = False,
+    base_url: str = "",
+) -> dict[str, Any]:
+    account_dir = _resolve_account_dir(account)
+    return build_chat_export_targets_preview(
+        account_dir=account_dir,
+        include_hidden=include_hidden,
+        include_official=include_official,
+        base_url=base_url,
+    )
+
+
 def _conversation_dir_name(
     idx: int,
     display_name: str,
diff --git a/src/wechat_decrypt_tool/routers/chat_export.py b/src/wechat_decrypt_tool/routers/chat_export.py
index feddffa..45d52c9 100644
--- a/src/wechat_decrypt_tool/routers/chat_export.py
+++ b/src/wechat_decrypt_tool/routers/chat_export.py
@@ -7,7 +7,7 @@ from fastapi import APIRouter, HTTPException, Request
 from fastapi.responses import FileResponse, StreamingResponse
 from pydantic import BaseModel, Field
 
-from ..chat_export_service import CHAT_EXPORT_MANAGER
+from ..chat_export_service import CHAT_EXPORT_MANAGER, get_chat_export_targets_preview
 from ..path_fix import PathFixRoute
 
 router = APIRouter(route_class=PathFixRoute)
@@ -101,6 +101,22 @@ async def list_chat_exports():
     return {"status": "success", "jobs": jobs}
 
 
+@router.get("/api/chat/exports/targets", summary="获取聊天记录导出目标预览")
+async def preview_chat_export_targets(
+    request: Request,
+    account: Optional[str] = None,
+    include_hidden: bool = True,
+    include_official: bool = False,
+):
+    base_url = str(request.base_url).rstrip("/")
+    return get_chat_export_targets_preview(
+        account=account,
+        include_hidden=bool(include_hidden),
+        include_official=bool(include_official),
+        base_url=base_url,
+    )
+
+
 @router.get("/api/chat/exports/{export_id}", summary="获取导出任务状态")
 async def get_chat_export(export_id: str):
     job = CHAT_EXPORT_MANAGER.get_job(str(export_id or "").strip())
diff --git a/tests/test_chat_export_targets.py b/tests/test_chat_export_targets.py
index 4325cc7..7932960 100644
--- a/tests/test_chat_export_targets.py
+++ b/tests/test_chat_export_targets.py
@@ -48,6 +48,7 @@ class TestChatExportTargets(unittest.TestCase):
                 ("wxid_no_session", "", "No session friend", "", 1, 0, "", ""),
                 ("wxid_session_hidden", "", "Hidden session friend", "", 1, 0, "", ""),
                 ("room_no_session@chatroom", "", "No session group", "", 1, 0, "", ""),
+                ("room_hidden@chatroom", "", "Hidden session group", "", 1, 0, "", ""),
                 ("gh_official_no_session", "", "Official account", "", 1, 24, "", ""),
                 ("wxid_no_messages", "", "No messages friend", "", 1, 0, "", ""),
             ]
@@ -70,6 +71,7 @@ class TestChatExportTargets(unittest.TestCase):
             )
             conn.execute("INSERT INTO SessionTable VALUES (?, ?, ?)", ("wxid_visible", 0, 100))
             conn.execute("INSERT INTO SessionTable VALUES (?, ?, ?)", ("wxid_session_hidden", 1, 200))
+            conn.execute("INSERT INTO SessionTable VALUES (?, ?, ?)", ("room_hidden@chatroom", 1, 250))
             conn.commit()
         finally:
             conn.close()
@@ -84,6 +86,7 @@ class TestChatExportTargets(unittest.TestCase):
                 "wxid_no_session",
                 "wxid_session_hidden",
                 "room_no_session@chatroom",
+                "room_hidden@chatroom",
                 "gh_official_no_session",
                 "wxid_no_messages",
             ]
@@ -95,6 +98,7 @@ class TestChatExportTargets(unittest.TestCase):
                 "wxid_no_session": 300,
                 "wxid_session_hidden": 400,
                 "room_no_session@chatroom": 350,
+                "room_hidden@chatroom": 450,
                 "gh_official_no_session": 360,
             }
             for username, create_time in message_usernames.items():
@@ -148,6 +152,7 @@ class TestChatExportTargets(unittest.TestCase):
             self.assertIn("wxid_no_session", targets)
             self.assertIn("room_no_session@chatroom", targets)
             self.assertNotIn("wxid_session_hidden", targets)
+            self.assertNotIn("room_hidden@chatroom", targets)
             self.assertNotIn("gh_official_no_session", targets)
             self.assertNotIn("wxid_no_messages", targets)
 
@@ -184,6 +189,37 @@ class TestChatExportTargets(unittest.TestCase):
             self.assertNotIn("room_no_session@chatroom", singles)
             self.assertIn("gh_official_no_session", with_official)
 
+    def test_preview_counts_match_bulk_export_targets_including_hidden_sessions(self):
+        import wechat_decrypt_tool.chat_export_service as svc
+
+        with TemporaryDirectory() as td:
+            account_dir = self._prepare_account(Path(td))
+
+            preview = svc.build_chat_export_targets_preview(
+                account_dir=account_dir,
+                include_hidden=True,
+                include_official=False,
+                base_url="http://example.test",
+            )
+            actual_targets = svc._resolve_export_targets(
+                account_dir=account_dir,
+                scope="all",
+                usernames=[],
+                include_hidden=True,
+                include_official=False,
+            )
+
+            preview_targets = preview["targets"]
+            preview_usernames = [item["username"] for item in preview_targets]
+            by_username = {item["username"]: item for item in preview_targets}
+
+            self.assertEqual(preview_usernames, actual_targets)
+            self.assertEqual(preview["counts"], {"total": 5, "groups": 2, "singles": 3})
+            self.assertTrue(by_username["room_hidden@chatroom"]["isHidden"])
+            self.assertTrue(by_username["room_hidden@chatroom"]["inSessionList"])
+            self.assertFalse(by_username["room_no_session@chatroom"]["inSessionList"])
+            self.assertTrue(by_username["room_no_session@chatroom"]["avatar"].startswith("http://example.test/api/chat/avatar?"))
+
 
 if __name__ == "__main__":
     unittest.main()