diff --git a/backend/api/routes/stats.py b/backend/api/routes/stats.py
index 266ac9f..606a2d2 100644
--- a/backend/api/routes/stats.py
+++ b/backend/api/routes/stats.py
@@ -135,7 +135,7 @@ async def get_dashboard_data(account_id: int = Depends(get_account_id)):
             logger.warning(f"获取实时持仓失败: {positions_error}", exc_info=True)
             # 回退到数据库记录
             try:
-                db_trades = Trade.get_all(status='open')[:10]
+                db_trades = Trade.get_all(status='open', account_id=account_id)[:10]
                 # 格式化数据库记录，添加 entry_value_usdt 字段
                 open_trades = []
                 for trade in db_trades:
diff --git a/frontend/src/App.jsx b/frontend/src/App.jsx
index 700b32f..294b4fa 100644
--- a/frontend/src/App.jsx
+++ b/frontend/src/App.jsx
@@ -13,51 +13,26 @@ import Login from './components/Login'
 import { api, clearAuthToken } from './services/api'
 import {
   setCurrentUser,
-  setViewingUserId,
   setUsers,
-  switchUser,
   selectCurrentUser,
-  selectViewingUserId,
   selectUsers,
   selectIsAdmin,
-  selectEffectiveUserId,
 } from './store/appSlice'
 import './App.css'
 
 function App() {
   const dispatch = useDispatch()
   const currentUser = useSelector(selectCurrentUser)
-  const viewingUserId = useSelector(selectViewingUserId)
-  const users = useSelector(selectUsers)
   const isAdmin = useSelector(selectIsAdmin)
-  const effectiveUserId = useSelector(selectEffectiveUserId)
   
   const [checking, setChecking] = useState(true)
-  const [showUserPopover, setShowUserPopover] = useState(false)
-  const userPopoverRef = React.useRef(null)
 
   const refreshMe = async () => {
     try {
       const u = await api.me()
       dispatch(setCurrentUser(u))
       
-      const isAdminValue = (u?.role || '') === 'admin'
-      
-      // 管理员：加载用户列表
-      if (isAdminValue) {
-        try {
-          const userList = await api.getUsers()
-          const usersArray = Array.isArray(userList) ? userList : []
-          dispatch(setUsers(usersArray))
-          // 如果viewingUserId未设置或不在列表中，设置为当前登录用户
-          const currentUserId = parseInt(String(u?.id || ''), 10)
-          if (!viewingUserId || !usersArray.some((user) => parseInt(String(user?.id || ''), 10) === viewingUserId)) {
-            dispatch(setViewingUserId(currentUserId))
-          }
-        } catch (e) {
-          console.error('加载用户列表失败:', e)
-        }
-      }
+      // 不再加载用户列表，去掉用户切换功能
     } catch (e) {
       dispatch(setCurrentUser(null))
     } finally {
@@ -65,31 +40,6 @@ function App() {
     }
   }
   
-  // 点击外部关闭popover
-  React.useEffect(() => {
-    const handleClickOutside = (event) => {
-      if (userPopoverRef.current && !userPopoverRef.current.contains(event.target)) {
-        setShowUserPopover(false)
-      }
-    }
-    if (showUserPopover) {
-      document.addEventListener('mousedown', handleClickOutside)
-      return () => document.removeEventListener('mousedown', handleClickOutside)
-    }
-  }, [showUserPopover])
-  
-  // 当前查看的用户信息
-  const currentViewingUser = users.find((u) => parseInt(String(u?.id || ''), 10) === viewingUserId)
-  
-  const handleSwitchUser = (userId) => {
-    const nextUserId = parseInt(String(userId || ''), 10)
-    if (Number.isFinite(nextUserId) && nextUserId > 0) {
-      dispatch(switchUser(nextUserId))
-      setShowUserPopover(false)
-      // 触发自定义事件，保持向后兼容
-      window.dispatchEvent(new CustomEvent('ats:user:switched', { detail: { userId: nextUserId } }))
-    }
-  }
 
   useEffect(() => {
     refreshMe()
@@ -132,88 +82,16 @@ function App() {
               ) : null}
             </div>
             <div className="nav-user">
-              {isAdmin ? (
-                <div className="nav-user-switcher" ref={userPopoverRef} style={{ position: 'relative', display: 'inline-block' }}>
-                  <button
-                    type="button"
-                    className="nav-user-switch-btn"
-                    onClick={() => setShowUserPopover(!showUserPopover)}
-                    title="切换查看的用户视角"
-                    style={{ 
-                      background: 'transparent', 
-                      border: 'none', 
-                      color: 'white', 
-                      cursor: 'pointer',
-                      padding: '4px 8px',
-                      borderRadius: '4px',
-                      display: 'flex',
-                      alignItems: 'center',
-                      gap: '4px'
-                    }}
-                  >
-                    <span>👤 {currentViewingUser?.username || currentUser?.username || '选择用户'}</span>
-                    {currentViewingUser?.role === 'admin' ? '（管理员）' : ''}
-                    <span>▼</span>
-                  </button>
-                  {showUserPopover && (
-                    <div className="nav-user-popover" style={{
-                      position: 'absolute',
-                      top: 'calc(100% + 8px)',
-                      right: 0,
-                      background: 'white',
-                      borderRadius: '8px',
-                      boxShadow: '0 4px 12px rgba(0,0,0,0.15)',
-                      minWidth: '200px',
-                      maxWidth: '300px',
-                      zIndex: 1000,
-                      overflow: 'hidden'
-                    }}>
-                      <div style={{ padding: '12px 16px', background: '#f5f5f5', borderBottom: '1px solid #e0e0e0', fontWeight: 600, fontSize: '14px', color: '#333' }}>
-                        切换用户视角
-                      </div>
-                      <div style={{ maxHeight: '300px', overflowY: 'auto' }}>
-                        {users.map((u) => (
-                          <div
-                            key={u.id}
-                            onClick={() => handleSwitchUser(u.id)}
-                            style={{
-                              padding: '12px 16px',
-                              cursor: 'pointer',
-                              transition: 'background-color 0.2s',
-                              borderBottom: '1px solid #f0f0f0',
-                              background: viewingUserId === u.id ? '#e3f2fd' : 'white'
-                            }}
-                            onMouseEnter={(e) => {
-                              if (viewingUserId !== u.id) e.currentTarget.style.background = '#f5f5f5'
-                            }}
-                            onMouseLeave={(e) => {
-                              if (viewingUserId !== u.id) e.currentTarget.style.background = 'white'
-                            }}
-                          >
-                            <div style={{ fontWeight: 500, fontSize: '14px', color: '#333', marginBottom: '4px' }}>
-                              {u.username || 'user'} {u.role === 'admin' ? '（管理员）' : ''}
-                            </div>
-                            <div style={{ fontSize: '12px', color: '#666' }}>
-                              {u.status === 'active' ? '启用' : '禁用'}
-                            </div>
-                          </div>
-                        ))}
-                      </div>
-                    </div>
-                  )}
-                </div>
-              ) : (
-                <span className="nav-user-name">
-                  {currentUser?.username ? currentUser.username : 'user'}
-                </span>
-              )}
+              <span className="nav-user-name">
+                {currentUser?.username ? currentUser.username : 'user'}
+                {isAdmin ? '（管理员）' : ''}
+              </span>
               <button
                 type="button"
                 className="nav-logout"
                 onClick={() => {
                   clearAuthToken()
                   dispatch(setCurrentUser(null))
-                  dispatch(setViewingUserId(null))
                   dispatch(setUsers([]))
                   setChecking(false)
                 }}
diff --git a/frontend/src/components/AccountSelector.jsx b/frontend/src/components/AccountSelector.jsx
index 4fd6df4..58998c5 100644
--- a/frontend/src/components/AccountSelector.jsx
+++ b/frontend/src/components/AccountSelector.jsx
@@ -8,9 +8,7 @@ import {
   selectAccountId,
   selectAccounts,
   selectCurrentUser,
-  selectViewingUserId,
   selectIsAdmin,
-  selectEffectiveUserId,
 } from '../store/appSlice'
 
 const AccountSelector = ({ onChanged }) => {
@@ -18,76 +16,32 @@ const AccountSelector = ({ onChanged }) => {
   const accountId = useSelector(selectAccountId)
   const accounts = useSelector(selectAccounts)
   const currentUser = useSelector(selectCurrentUser)
-  const viewingUserId = useSelector(selectViewingUserId)
   const isAdmin = useSelector(selectIsAdmin)
-  const effectiveUserId = useSelector(selectEffectiveUserId)
 
-  // 监听用户切换事件（管理员切换用户时触发）
+  // 加载当前用户的账号列表
   useEffect(() => {
-    const handleUserSwitched = (e) => {
-      const userId = e?.detail?.userId
-      if (userId && isAdmin) {
-        // 重新加载该用户的账号列表
-        api.getUserAccounts(userId)
-          .then((list) => {
-            const accountsList = (Array.isArray(list) ? list : []).map((item) => ({
-              id: item.account_id || item.id,
-              name: item.account_name || item.name || '',
-              status: item.account_status || item.status || 'active',
-              role: item.role || 'viewer',
-              user_id: item.user_id
-            }))
-            dispatch(setAccounts(accountsList))
-            // 自动选择第一个账号（不管是否disabled）
-            if (accountsList.length > 0) {
+    const load = () => {
+      api.getAccounts()
+        .then((list) => {
+          const accountsList = Array.isArray(list) ? list : []
+          dispatch(setAccounts(accountsList))
+          // 如果当前没有选中的账号，或者选中的账号不在列表中，自动选择第一个账号
+          if (accountsList.length > 0) {
+            const currentAccount = accountsList.find((a) => a.id === accountId)
+            if (!currentAccount) {
               dispatch(selectFirstAccount())
             }
-          })
-          .catch(() => dispatch(setAccounts([])))
-      }
+          }
+        })
+        .catch(() => dispatch(setAccounts([])))
     }
-    window.addEventListener('ats:user:switched', handleUserSwitched)
-    return () => window.removeEventListener('ats:user:switched', handleUserSwitched)
-  }, [isAdmin, dispatch])
+    load()
 
-  // 根据effectiveUserId加载账号列表（管理员查看指定用户，普通用户查看自己）
-  useEffect(() => {
-    if (effectiveUserId) {
-      if (isAdmin) {
-        // 管理员：加载指定用户的账号列表
-        api.getUserAccounts(effectiveUserId)
-          .then((list) => {
-            // 转换数据格式：后端返回 {account_id, account_name, account_status}，前端期望 {id, name, status}
-            const accountsList = (Array.isArray(list) ? list : []).map((item) => ({
-              id: item.account_id || item.id,
-              name: item.account_name || item.name || '',
-              status: item.account_status || item.status || 'active',
-              role: item.role || 'viewer',
-              user_id: item.user_id
-            }))
-            dispatch(setAccounts(accountsList))
-            // 自动选择第一个账号（不管是否disabled）
-            if (accountsList.length > 0) {
-              dispatch(selectFirstAccount())
-            }
-          })
-          .catch(() => dispatch(setAccounts([])))
-      } else {
-        // 普通用户：直接加载自己的账号列表
-        const load = () => {
-          api.getAccounts()
-            .then((list) => dispatch(setAccounts(Array.isArray(list) ? list : [])))
-            .catch(() => dispatch(setAccounts([])))
-        }
-        load()
-
-        // 配置页创建/更新账号后会触发该事件，用于即时刷新下拉列表
-        const onUpdated = () => load()
-        window.addEventListener('ats:accounts:updated', onUpdated)
-        return () => window.removeEventListener('ats:accounts:updated', onUpdated)
-      }
-    }
-  }, [isAdmin, effectiveUserId, dispatch])
+    // 配置页创建/更新账号后会触发该事件，用于即时刷新下拉列表
+    const onUpdated = () => load()
+    window.addEventListener('ats:accounts:updated', onUpdated)
+    return () => window.removeEventListener('ats:accounts:updated', onUpdated)
+  }, [dispatch, accountId])
 
   // 当 accountId 变化时，调用 onChanged 回调
   useEffect(() => {
@@ -148,10 +102,9 @@ const AccountSelector = ({ onChanged }) => {
           }
         }}
         title="切换账号后：配置/持仓/交易记录/统计会按账号隔离；推荐仍是全局"
-        disabled={isAdmin && !effectiveUserId}
       >
         {options.length === 0 ? (
-          <option value="">{isAdmin && !effectiveUserId ? '请先选择用户' : '暂无账号'}</option>
+          <option value="">暂无账号</option>
         ) : (
           options.map((a) => {
             const isDisabled = String(a?.status || 'active') === 'disabled'
diff --git a/frontend/src/components/ConfigPanel.jsx b/frontend/src/components/ConfigPanel.jsx
index d1166a7..ac511cf 100644
--- a/frontend/src/components/ConfigPanel.jsx
+++ b/frontend/src/components/ConfigPanel.jsx
@@ -16,9 +16,7 @@ const ConfigPanel = () => {
   const dispatch = useDispatch()
   const accountId = useSelector(selectAccountId) // 从 Redux 获取当前账号ID
   const currentUser = useSelector(selectCurrentUser)
-  const viewingUserId = useSelector(selectViewingUserId)
   const isAdmin = useSelector(selectIsAdmin)
-  const effectiveUserId = useSelector(selectEffectiveUserId)
   
   const [configs, setConfigs] = useState({})
   const [loading, setLoading] = useState(true)
diff --git a/frontend/src/components/StatsDashboard.jsx b/frontend/src/components/StatsDashboard.jsx
index 5dcb991..a1bdb5b 100644
--- a/frontend/src/components/StatsDashboard.jsx
+++ b/frontend/src/components/StatsDashboard.jsx
@@ -43,11 +43,23 @@ const StatsDashboard = () => {
   }
 
   useEffect(() => {
+    // 只在 accountId 存在时才加载数据，避免加载上一个账号的数据
+    if (!accountId) {
+      setLoading(false)
+      return
+    }
+    
+    // 重置状态，避免显示上一个账号的数据
+    setDashboardData(null)
+    setLoading(true)
+    
     loadDashboard()
     loadTradingConfig()
     const interval = setInterval(() => {
-      loadDashboard()
-      loadTradingConfig()  // 同时刷新配置
+      if (accountId) {
+        loadDashboard()
+        loadTradingConfig()  // 同时刷新配置
+      }
     }, 30000) // 每30秒刷新
     
     return () => {