diff --git a/backend/app/models/models.py b/backend/app/models/models.py
index 3007da0..8fb2bc2 100644
--- a/backend/app/models/models.py
+++ b/backend/app/models/models.py
@@ -87,6 +87,7 @@ class Meeting(BaseModel):
     overall_status: Optional[str] = None
     overall_progress: Optional[int] = None
     current_stage: Optional[str] = None
+    access_password: Optional[str] = None
 
 class TranscriptSegment(BaseModel):
     segment_id: int
diff --git a/frontend/src/components/QRCodeModal.jsx b/frontend/src/components/QRCodeModal.jsx
index eb747a3..aa9cb55 100644
--- a/frontend/src/components/QRCodeModal.jsx
+++ b/frontend/src/components/QRCodeModal.jsx
@@ -5,7 +5,7 @@ import { QRCodeSVG } from 'qrcode.react';
 
 const { Text, Paragraph } = Typography;
 
-const QRCodeModal = ({ open, onClose, url, title = "扫描二维码分享" }) => {
+const QRCodeModal = ({ open, onClose, url, title = "扫描二维码分享", children }) => {
   const { message } = App.useApp();
 
   const handleCopy = () => {
@@ -43,6 +43,11 @@ const QRCodeModal = ({ open, onClose, url, title = "扫描二维码分享" }) =>
         <div style={{ marginTop: 12, background: '#f5f5f5', padding: '8px 12px', borderRadius: 6, textAlign: 'left' }}>
           <Text code ellipsis style={{ width: '100%', display: 'block' }}>{url}</Text>
         </div>
+        {children ? (
+          <div style={{ marginTop: 20, textAlign: 'left' }}>
+            {children}
+          </div>
+        ) : null}
       </div>
     </Modal>
   );
diff --git a/frontend/src/config/api.js b/frontend/src/config/api.js
index dfc8abd..190b6a1 100644
--- a/frontend/src/config/api.js
+++ b/frontend/src/config/api.js
@@ -36,6 +36,7 @@ const API_CONFIG = {
       UPLOAD_IMAGE: (meetingId) => `/api/meetings/${meetingId}/upload-image`,
       REGENERATE_SUMMARY: (meetingId) => `/api/meetings/${meetingId}/regenerate-summary`,
       NAVIGATION: (meetingId) => `/api/meetings/${meetingId}/navigation`,
+      ACCESS_PASSWORD: (meetingId) => `/api/meetings/${meetingId}/access-password`,
       PREVIEW_DATA: (meetingId) => `/api/meetings/${meetingId}/preview-data`,
       LLM_MODELS: '/api/llm-models/active'
     },
diff --git a/frontend/src/pages/MeetingDetails.jsx b/frontend/src/pages/MeetingDetails.jsx
index d72a6ce..4643d10 100644
--- a/frontend/src/pages/MeetingDetails.jsx
+++ b/frontend/src/pages/MeetingDetails.jsx
@@ -3,7 +3,7 @@ import { useParams, useNavigate } from 'react-router-dom';
 import {
   Card, Row, Col, Button, Space, Typography, Tag, Avatar,
   Tooltip, Progress, Spin, App, Dropdown,
-  Divider, List, Timeline, Tabs, Input, Upload, Empty, Drawer, Select
+  Divider, List, Timeline, Tabs, Input, Upload, Empty, Drawer, Select, Switch
 } from 'antd';
 import {
   ClockCircleOutlined, UserOutlined,
@@ -75,6 +75,9 @@ const MeetingDetails = ({ user }) => {
   const [showQRModal, setShowQRModal] = useState(false);
   const [isUploading, setIsUploading] = useState(false);
   const [playbackRate, setPlaybackRate] = useState(1);
+  const [accessPasswordEnabled, setAccessPasswordEnabled] = useState(false);
+  const [accessPasswordDraft, setAccessPasswordDraft] = useState('');
+  const [savingAccessPassword, setSavingAccessPassword] = useState(false);
 
   // 转录编辑 Drawer
   const [showTranscriptEditDrawer, setShowTranscriptEditDrawer] = useState(false);
@@ -87,6 +90,7 @@ const MeetingDetails = ({ user }) => {
 
   const audioRef = useRef(null);
   const transcriptRefs = useRef([]);
+  const isMeetingOwner = user?.user_id === meeting?.creator_id;
 
   /* ══════════════════ 数据获取 ══════════════════ */
 
@@ -105,6 +109,8 @@ const MeetingDetails = ({ user }) => {
       setLoading(true);
       const response = await apiClient.get(buildApiUrl(API_ENDPOINTS.MEETINGS.DETAIL(meeting_id)));
       setMeeting(response.data);
+      setAccessPasswordEnabled(Boolean(response.data.access_password));
+      setAccessPasswordDraft(response.data.access_password || '');
 
       if (response.data.transcription_status) {
         const ts = response.data.transcription_status;
@@ -220,6 +226,40 @@ const MeetingDetails = ({ user }) => {
     finally { setIsUploading(false); }
   };
 
+  const saveAccessPassword = async () => {
+    const nextPassword = accessPasswordEnabled ? accessPasswordDraft.trim() : null;
+    if (accessPasswordEnabled && !nextPassword) {
+      message.warning('开启访问密码后，请先输入密码');
+      return;
+    }
+
+    setSavingAccessPassword(true);
+    try {
+      const res = await apiClient.put(
+        buildApiUrl(API_ENDPOINTS.MEETINGS.ACCESS_PASSWORD(meeting_id)),
+        { password: nextPassword }
+      );
+      const savedPassword = res.data?.password || null;
+      setMeeting((prev) => (prev ? { ...prev, access_password: savedPassword } : prev));
+      setAccessPasswordEnabled(Boolean(savedPassword));
+      setAccessPasswordDraft(savedPassword || '');
+      message.success(res.message || '访问密码已更新');
+    } catch (error) {
+      message.error(error?.response?.data?.message || '访问密码更新失败');
+    } finally {
+      setSavingAccessPassword(false);
+    }
+  };
+
+  const copyAccessPassword = async () => {
+    if (!accessPasswordDraft) {
+      message.warning('当前没有可复制的访问密码');
+      return;
+    }
+    await navigator.clipboard.writeText(accessPasswordDraft);
+    message.success('访问密码已复制');
+  };
+
   const openAudioUploadPicker = () => {
     document.getElementById('audio-upload-input')?.click();
   };
@@ -864,7 +904,48 @@ const MeetingDetails = ({ user }) => {
         )}
       </Drawer>
 
-      <QRCodeModal open={showQRModal} onClose={() => setShowQRModal(false)} url={`${window.location.origin}/meetings/preview/${meeting_id}`} />
+      <QRCodeModal open={showQRModal} onClose={() => setShowQRModal(false)} url={`${window.location.origin}/meetings/preview/${meeting_id}`}>
+        {isMeetingOwner ? (
+          <>
+            <Divider style={{ margin: '0 0 16px' }} />
+            <div style={{ display: 'flex', justifyContent: 'space-between', alignItems: 'center', marginBottom: 12 }}>
+              <Text strong>访问密码保护</Text>
+              <Switch
+                checked={accessPasswordEnabled}
+                checkedChildren="已开启"
+                unCheckedChildren="已关闭"
+                onChange={setAccessPasswordEnabled}
+              />
+            </div>
+            {accessPasswordEnabled ? (
+              <Space direction="vertical" style={{ width: '100%' }} size={12}>
+                <Input.Password
+                  value={accessPasswordDraft}
+                  onChange={(e) => setAccessPasswordDraft(e.target.value)}
+                  placeholder="请输入访问密码"
+                />
+                <Space style={{ width: '100%', justifyContent: 'space-between' }} wrap>
+                  <Text type="secondary">开启后，访客打开分享链接时需要输入这个密码</Text>
+                  <Space>
+                    <Button onClick={copyAccessPassword} disabled={!accessPasswordDraft}>复制密码</Button>
+                    <Button type="primary" loading={savingAccessPassword} onClick={saveAccessPassword}>保存密码</Button>
+                  </Space>
+                </Space>
+              </Space>
+            ) : (
+              <Space style={{ width: '100%', justifyContent: 'space-between' }} wrap>
+                <Text type="secondary">关闭后，任何拿到链接的人都可以直接查看预览页</Text>
+                <Button type="primary" loading={savingAccessPassword} onClick={saveAccessPassword}>关闭密码保护</Button>
+              </Space>
+            )}
+          </>
+        ) : meeting?.access_password ? (
+          <>
+            <Divider style={{ margin: '0 0 16px' }} />
+            <Text type="secondary">该分享链接已启用访问密码，密码由会议创建人管理。</Text>
+          </>
+        ) : null}
+      </QRCodeModal>
       <MeetingFormDrawer
         open={editDrawerOpen}
         onClose={() => setEditDrawerOpen(false)}