diff --git a/src/pages/HomePage.tsx b/src/pages/HomePage.tsx
index 7fe1171..07507b4 100644
--- a/src/pages/HomePage.tsx
+++ b/src/pages/HomePage.tsx
@@ -139,13 +139,13 @@ export default function HomePage() {
                 color: '#04121f',
                 background: 'linear-gradient(135deg, #00d4ff, #4f9eff)',
               }}>
-                {userInfo.userId.charAt(0).toUpperCase()}
+                {(userInfo.userName ?? userInfo.userId).charAt(0).toUpperCase()}
               </div>
               <span style={{
                 fontSize: 13,
                 ...(isDark ? { color: 'rgba(168,216,255,0.85)' } : { color: '#334155' }),
               }}>
-                {userInfo.userId}
+                {userInfo.userName ?? userInfo.userId}
               </span>
               <button
                 onClick={handleLogout}
diff --git a/src/pages/LoginPage.tsx b/src/pages/LoginPage.tsx
index 83a84ec..99f9fa2 100644
--- a/src/pages/LoginPage.tsx
+++ b/src/pages/LoginPage.tsx
@@ -1,6 +1,6 @@
 import { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
-import { User, Lock, Building2, LogIn, AlertCircle, Loader2 } from 'lucide-react';
+import { User, Lock, LogIn, AlertCircle, Loader2 } from 'lucide-react';
 import StarBackground from '@/shared/components/StarBackground';
 import { iamLogin, saveSession } from '@/shared/services/iamAuth';
 import { useTheme } from '@/shared/context/ThemeContext';
@@ -33,7 +33,6 @@ export default function LoginPage() {
 
   const [userId, setUserId] = useState('');
   const [password, setPassword] = useState('');
-  const [tenantId, setTenantId] = useState('');
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState('');
 
@@ -51,12 +50,8 @@ export default function LoginPage() {
     setLoading(true);
     setError('');
     try {
-      const result = await iamLogin({ userId: userId.trim(), password, tenantId: tenantId.trim() || undefined });
-      saveSession(result.token, {
-        userId: result.userId,
-        tenantId: result.tenantId,
-        loginTime: new Date().toLocaleString('zh-CN'),
-      });
+      const result = await iamLogin({ userId: userId.trim(), password });
+      saveSession(result.token, result.userInfo);
       navigate('/', { replace: true });
     } catch (ex) {
       setError(ex instanceof Error ? ex.message : '登录失败，请稍后重试');
@@ -138,7 +133,7 @@ export default function LoginPage() {
             </div>
           </div>
 
-          <div style={{ marginBottom: 16 }}>
+          <div style={{ marginBottom: 20 }}>
             <label style={{ display: 'block', fontSize: 13, marginBottom: 6, color: isDark ? 'rgba(168,216,255,0.8)' : '#475569' }}>
               密码
             </label>
@@ -157,24 +152,6 @@ export default function LoginPage() {
             </div>
           </div>
 
-          <div style={{ marginBottom: 20 }}>
-            <label style={{ display: 'block', fontSize: 13, marginBottom: 6, color: isDark ? 'rgba(168,216,255,0.8)' : '#475569' }}>
-              租户 ID（可选）
-            </label>
-            <div style={{ position: 'relative' }}>
-              <Building2 size={16} style={iconStyle(isDark)} />
-              <input
-                type="text"
-                value={tenantId}
-                onChange={(e) => setTenantId(e.target.value)}
-                placeholder="不填则自动匹配已授权租户"
-                style={inputStyle(isDark)}
-                onFocus={(e) => { e.currentTarget.style.borderColor = '#00d4ff'; }}
-                onBlur={(e) => { e.currentTarget.style.borderColor = isDark ? 'rgba(0,212,255,0.25)' : 'rgba(0,0,0,0.12)'; }}
-              />
-            </div>
-          </div>
-
           {error && (
             <div style={{
               display: 'flex', alignItems: 'center', gap: 8,
diff --git a/src/pages/SSOLogin.tsx b/src/pages/SSOLogin.tsx
index 6b9112e..a50a998 100644
--- a/src/pages/SSOLogin.tsx
+++ b/src/pages/SSOLogin.tsx
@@ -1,21 +1,47 @@
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { useNavigate, useSearchParams } from 'react-router-dom';
 import { Spin } from 'antd';
+import { AlertCircle } from 'lucide-react';
+import { iamSsoLogin, saveSession } from '@/shared/services/iamAuth';
 
 /**
  * SSO 登录回调入口
- * 接收 URL 参数 userToken，写入 sessionStorage 后跳转首页
+ *
+ * 流程：
+ * 1. 从 URL 参数获取 userToken
+ * 2. 调用 iamSsoLogin 完成：
+ *    - POST /identity/token/refresh/app  刷新应用 token + 用户信息
+ *    - POST /identity/login/info         获取登录详情
+ *    - POST /tenant?appId=APPID          拉取租户列表，选默认租户
+ *    - POST /identity/token/refresh/tenant 切换租户刷新 token
+ * 3. userInfo 写入 sessionStorage，跳转首页
  */
 const SSOLogin: React.FC = () => {
   const navigate = useNavigate();
   const [searchParams] = useSearchParams();
+  const [error, setError] = useState<string>('');
 
   useEffect(() => {
     const userToken = searchParams.get('userToken');
-    if (userToken) {
-      sessionStorage.setItem('userToken', userToken);
+    if (!userToken) {
+      setError('URL 缺少 userToken 参数');
+      return;
     }
-    navigate('/', { replace: true });
+
+    let cancelled = false;
+    (async () => {
+      try {
+        const result = await iamSsoLogin(userToken);
+        if (cancelled) return;
+        saveSession(result.token, result.userInfo);
+        navigate('/', { replace: true });
+      } catch (ex) {
+        if (cancelled) return;
+        setError(ex instanceof Error ? ex.message : 'SSO 登录失败');
+      }
+    })();
+
+    return () => { cancelled = true; };
   }, [searchParams, navigate]);
 
   return (
@@ -26,8 +52,40 @@ const SSOLogin: React.FC = () => {
       alignItems: 'center',
       justifyContent: 'center',
       background: '#0a1628',
+      color: '#a8d8ff',
+      fontFamily: "-apple-system, 'SF Pro Display', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif",
     }}>
-      <Spin size="large" tip="正在登录..." />
+      {error ? (
+        <div style={{
+          display: 'flex', flexDirection: 'column', alignItems: 'center', gap: 16,
+          padding: '32px 40px',
+          borderRadius: 16,
+          background: 'rgba(239,68,68,0.08)',
+          border: '1px solid rgba(239,68,68,0.4)',
+          maxWidth: 460,
+        }}>
+          <AlertCircle size={36} color="#fca5a5" />
+          <div style={{ fontSize: 16, fontWeight: 600, color: '#fca5a5' }}>SSO 登录失败</div>
+          <div style={{ fontSize: 13, color: 'rgba(168,216,255,0.7)', textAlign: 'center', wordBreak: 'break-all' }}>
+            {error}
+          </div>
+          <button
+            onClick={() => navigate('/login', { replace: true })}
+            style={{
+              marginTop: 8, padding: '8px 20px', borderRadius: 8,
+              border: '1px solid rgba(0,212,255,0.4)', background: 'rgba(0,212,255,0.1)',
+              color: '#00d4ff', fontSize: 13, cursor: 'pointer',
+            }}
+          >
+            前往登录页
+          </button>
+        </div>
+      ) : (
+        <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', gap: 16 }}>
+          <Spin size="large" />
+          <div style={{ fontSize: 14, color: 'rgba(168,216,255,0.7)' }}>正在登录...</div>
+        </div>
+      )}
     </div>
   );
 };
diff --git a/src/shared/services/iamAuth.ts b/src/shared/services/iamAuth.ts
index bca6eb5..ca268fd 100644
--- a/src/shared/services/iamAuth.ts
+++ b/src/shared/services/iamAuth.ts
@@ -3,23 +3,24 @@ import { JSEncrypt } from 'jsencrypt';
 /**
  * 鼎捷云 IAM 登录服务（纯前端实现）
  *
- * 加密流程（RSA + AES）:
- * 1. 客户端生成 RSA 密钥对
- * 2. GET  /api/iam/v2/identity/publickey 获取服务端公钥
- * 3. 用服务端公钥加密客户端公钥 → clientEncryptPublicKey
- * 4. POST /api/iam/v2/identity/aeskey 获取被加密的 AES 密钥
- * 5. 用客户端私钥解密得到 aesKey（16 位）
- * 6. AES-CBC 加密密码 → passwordHash
- * 7. POST /api/iam/v2/identity/login 获取 userToken
+ * 完整登录流程：
+ * 1. RSA+AES 加密链路获取 userToken（/api/iam/v2/identity/login）
+ * 2. 拉取用户授权租户列表（POST /api/iam/v2/tenant?appId=APPID），默认选第一个
+ * 3. 切换租户刷新 token（POST /api/iam/v2/identity/token/refresh/tenant）
+ * 4. 将完整用户信息（含 authoredUser）写入 sessionStorage
  */
 
 // 代理路径（vite.config.ts 中 /iam-api → https://iam.digiwincloud.com.cn）
-const IAM_BASE = '/iam-api/api/iam/v2/identity';
+const IAM_API_BASE = '/iam-api/api/iam/v2';
+const IAM_IDENTITY_BASE = `${IAM_API_BASE}/identity`;
 
 // 应用 apptoken（digi-middleware-auth-app）
 export const APP_TOKEN =
   'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6ImRhdGEtYnVzaW5lc3MtZGVtbyIsInNpZCI6MH0.Spo64LstbWxjYNefVFAbEbgfjzZoQGNcqKSGuYUOCRk';
 
+// 应用 ID（用于租户列表查询）
+export const APPID = 'data-business-demo';
+
 // IAM AES 加密固定 IV（16 字节）
 const AES_IV = 'ghUb#er57HBh(u%g';
 
@@ -48,8 +49,8 @@ async function aesEncryptToBase64(plainText: string, aesKey: string): Promise<st
   return btoa(bin);
 }
 
-/** 通用请求头 */
-function iamHeaders(extra?: Record<string, string>): Record<string, string> {
+/** 应用层请求头（含 apptoken） */
+function appHeaders(extra?: Record<string, string>): Record<string, string> {
   return {
     'Content-Type': 'application/json',
     'digi-middleware-auth-app': APP_TOKEN,
@@ -57,6 +58,25 @@ function iamHeaders(extra?: Record<string, string>): Record<string, string> {
   };
 }
 
+/** 用户鉴权请求头（含 apptoken + usertoken） */
+function userHeaders(userToken: string, extra?: Record<string, string>): Record<string, string> {
+  return appHeaders({
+    'digi-middleware-auth-user': userToken,
+    ...extra,
+  });
+}
+
+/** 从任意对象中尝试提取 token 字符串 */
+function pickToken(obj: Record<string, unknown>): string | undefined {
+  if (typeof obj.token === 'string') return obj.token;
+  if (typeof obj.userToken === 'string') return obj.userToken;
+  const data = obj.data as Record<string, unknown> | undefined;
+  if (data && typeof data.token === 'string') return data.token;
+  const result = obj.result as Record<string, unknown> | undefined;
+  if (result && typeof result.token === 'string') return result.token;
+  return undefined;
+}
+
 export interface IamLoginParams {
   userId: string;
   password: string;
@@ -64,15 +84,17 @@ export interface IamLoginParams {
 }
 
 export interface IamLoginResult {
+  /** 最终 userToken（经 refresh/tenant 刷新后） */
   token: string;
+  /** userId */
   userId: string;
-  tenantId: string;
-  raw: Record<string, unknown>;
+  /** 完整用户信息（含 login 原始返回 + authoredUser + 默认租户） */
+  userInfo: Record<string, unknown>;
 }
 
 /**
  * IAM 普通登录（identityType: query）
- * 支持用户 id / 手机号 / 邮箱
+ * 完整流程：加密登录 → 拉取租户列表 → 切换默认租户刷新 token
  */
 export async function iamLogin({ userId, password, tenantId }: IamLoginParams): Promise<IamLoginResult> {
   // 1. 客户端生成 RSA 密钥对（1024）
@@ -82,7 +104,7 @@ export async function iamLogin({ userId, password, tenantId }: IamLoginParams):
   const clientPublicKeyB64 = stripPem(client.getPublicKey());
 
   // 2. 获取服务端公钥
-  const pkRes = await fetch(`${IAM_BASE}/publickey`, { headers: iamHeaders() });
+  const pkRes = await fetch(`${IAM_IDENTITY_BASE}/publickey`, { headers: appHeaders() });
   if (!pkRes.ok) throw new Error(`获取服务端公钥失败 (HTTP ${pkRes.status})`);
   const pkJson = await pkRes.json();
   const serverPublicKey: string = pkJson.publicKey;
@@ -95,9 +117,9 @@ export async function iamLogin({ userId, password, tenantId }: IamLoginParams):
   if (!clientEncryptPublicKey) throw new Error('加密客户端公钥失败');
 
   // 4. 获取加密的 AES 密钥
-  const aesRes = await fetch(`${IAM_BASE}/aeskey`, {
+  const aesRes = await fetch(`${IAM_IDENTITY_BASE}/aeskey`, {
     method: 'POST',
-    headers: iamHeaders(),
+    headers: appHeaders(),
     body: JSON.stringify({ clientEncryptPublicKey }),
   });
   if (!aesRes.ok) throw new Error(`获取 AES 密钥失败 (HTTP ${aesRes.status})`);
@@ -114,32 +136,190 @@ export async function iamLogin({ userId, password, tenantId }: IamLoginParams):
   const passwordHash = await aesEncryptToBase64(password, aesKey);
 
   // 7. 登录
-  const body: Record<string, string> = {
+  const loginBody: Record<string, string> = {
     userId,
     passwordHash,
     clientEncryptPublicKey,
     identityType: 'query',
   };
-  if (tenantId) body.tenantId = tenantId;
+  if (tenantId) loginBody.tenantId = tenantId;
 
-  const loginRes = await fetch(`${IAM_BASE}/login`, {
+  const loginRes = await fetch(`${IAM_IDENTITY_BASE}/login`, {
     method: 'POST',
-    headers: iamHeaders(),
-    body: JSON.stringify(body),
+    headers: appHeaders(),
+    body: JSON.stringify(loginBody),
   });
-  const loginJson = await loginRes.json().catch(() => ({}));
+  const loginJson = (await loginRes.json().catch(() => ({}))) as Record<string, unknown>;
 
-  const token: string | undefined = loginJson.token ?? loginJson.data?.token ?? loginJson.userToken;
-  if (!loginRes.ok || !token) {
+  const initialToken = pickToken(loginJson);
+  if (!loginRes.ok || !initialToken) {
     const msg = loginJson.message || loginJson.msg || loginJson.error || `HTTP ${loginRes.status}`;
     throw new Error(`登录失败: ${msg}`);
   }
 
-  return {
-    token,
+  // 8. 拉取用户授权租户列表 + 切换默认租户
+  const tenantCtx = await switchDefaultTenant(initialToken);
+
+  // 9. 组装完整 userInfo：
+  //   - authoredUser 内容平铺到顶层（sid/userName/email/currTenantList 等）
+  //   - token 使用最终刷新后的 token
+  //   - 保留 isLoggedin 标识
+  const userInfo: Record<string, unknown> = {
+    ...(tenantCtx.authoredUser ?? {}),
+    ...(loginJson ?? {}),
     userId,
-    tenantId: loginJson.tenantId ?? tenantId ?? '',
-    raw: loginJson,
+    token: tenantCtx.token,
+    isLoggedin: true,
+    ...(tenantCtx.currTenantList ? { currTenantList: tenantCtx.currTenantList } : {}),
+  };
+
+  return {
+    token: tenantCtx.token,
+    userId,
+    userInfo,
+  };
+}
+
+/**
+ * 切换默认租户（公用流程）
+ *
+ * 1. POST /api/iam/v2/tenant?appId=APPID 拉取租户列表
+ * 2. 优先选 isDefault=true 的租户，否则取第一个
+ * 3. POST /api/iam/v2/identity/token/refresh/tenant body={tenantSid}
+ * 4. 返回刷新后的 token + authoredUser + currTenantList
+ *
+ * 异常不抛出，回退到传入的 userToken
+ */
+export async function switchDefaultTenant(
+  userToken: string,
+): Promise<{
+  token: string;
+  authoredUser?: Record<string, unknown>;
+  currTenantList?: unknown[];
+}> {
+  let finalToken = userToken;
+  let authoredUser: Record<string, unknown> | undefined;
+  let currTenantList: unknown[] | undefined;
+
+  try {
+    const tenantRes = await fetch(`${IAM_API_BASE}/tenant?appId=${encodeURIComponent(APPID)}`, {
+      method: 'POST',
+      headers: userHeaders(userToken),
+    });
+    if (!tenantRes.ok) throw new Error(`获取租户列表失败 (HTTP ${tenantRes.status})`);
+    const tenantJson = (await tenantRes.json().catch(() => ({}))) as Record<string, unknown>;
+
+    // 兼容数组 / {data:[]} / {list:[]} / {result:[]}
+    let tenants: unknown[] = [];
+    if (Array.isArray(tenantJson)) {
+      tenants = tenantJson;
+    } else if (Array.isArray(tenantJson.data)) {
+      tenants = tenantJson.data as unknown[];
+    } else if (Array.isArray(tenantJson.list)) {
+      tenants = tenantJson.list as unknown[];
+    } else if (Array.isArray(tenantJson.result)) {
+      tenants = tenantJson.result as unknown[];
+    }
+
+    if (tenants.length > 0) {
+      currTenantList = tenants;
+      // 优先选 isDefault=true 的租户，否则取第一个
+      const defaultTenant = (tenants.find((t) => (t as Record<string, unknown>)?.isDefault === true)
+        ?? tenants[0]) as Record<string, unknown>;
+      const tenantSid = (defaultTenant.sid as number | string | undefined)
+        ?? (defaultTenant.tenantSid as number | string | undefined)
+        ?? (defaultTenant.id as number | string | undefined);
+
+      if (tenantSid !== undefined && tenantSid !== null) {
+        // 切换默认租户，刷新 token
+        const refreshRes = await fetch(`${IAM_IDENTITY_BASE}/token/refresh/tenant`, {
+          method: 'POST',
+          headers: userHeaders(userToken),
+          body: JSON.stringify({ tenantSid }),
+        });
+        if (refreshRes.ok) {
+          const refreshJson = (await refreshRes.json().catch(() => ({}))) as Record<string, unknown>;
+          const refreshedToken = pickToken(refreshJson);
+          if (refreshedToken) finalToken = refreshedToken;
+          // authoredUser 平铺到 userInfo 顶层
+          if (refreshJson.authoredUser && typeof refreshJson.authoredUser === 'object') {
+            authoredUser = refreshJson.authoredUser as Record<string, unknown>;
+          } else if (refreshJson.data && typeof refreshJson.data === 'object'
+            && (refreshJson.data as Record<string, unknown>).authoredUser) {
+            authoredUser = (refreshJson.data as Record<string, unknown>).authoredUser as Record<string, unknown>;
+          } else {
+            // 整个 refresh 返回作为 authoredUser（兼容字段直接在顶层）
+            authoredUser = refreshJson;
+          }
+        }
+      }
+    }
+  } catch (ex) {
+    // 租户切换失败不阻断登录，仍使用原 token
+    console.warn('[IAM] 租户切换流程异常，将使用原 token', ex);
+  }
+
+  return { token: finalToken, authoredUser, currTenantList };
+}
+
+/**
+ * SSO 登录（基于外部传入的 userToken）
+ *
+ * 流程：
+ * 1. POST /api/iam/v2/identity/token/refresh/app 刷新应用 token + 用户信息
+ * 2. POST /api/iam/v2/identity/login/info 获取登录详情
+ * 3. 调用 switchDefaultTenant 拉取租户列表 + 切换默认租户
+ * 4. 组装完整 userInfo（authoredUser 平铺到顶层）
+ */
+export async function iamSsoLogin(initialUserToken: string): Promise<IamLoginResult> {
+  // 1. token/refresh/app：刷新应用 token
+  const refreshAppRes = await fetch(`${IAM_IDENTITY_BASE}/token/refresh/app`, {
+    method: 'POST',
+    headers: userHeaders(initialUserToken),
+  });
+  if (!refreshAppRes.ok) throw new Error(`SSO token 刷新失败 (HTTP ${refreshAppRes.status})`);
+  const refreshAppJson = (await refreshAppRes.json().catch(() => ({}))) as Record<string, unknown>;
+  const appRefreshedToken = pickToken(refreshAppJson) ?? initialUserToken;
+
+  // 2. login/info：获取登录详情
+  let loginInfoJson: Record<string, unknown> = {};
+  try {
+    const infoRes = await fetch(`${IAM_IDENTITY_BASE}/login/info`, {
+      method: 'POST',
+      headers: userHeaders(appRefreshedToken),
+    });
+    if (infoRes.ok) {
+      loginInfoJson = (await infoRes.json().catch(() => ({}))) as Record<string, unknown>;
+    }
+  } catch (ex) {
+    console.warn('[IAM] login/info 调用异常', ex);
+  }
+
+  // 3. 切换默认租户
+  const tenantCtx = await switchDefaultTenant(appRefreshedToken);
+
+  // 4. 组装完整 userInfo
+  //   优先级：tenantCtx.authoredUser > refreshAppJson > loginInfoJson
+  //   userId 从 loginInfo/refreshApp 中提取
+  const userId = (loginInfoJson.userId as string)
+    ?? (refreshAppJson.userId as string)
+    ?? (tenantCtx.authoredUser?.userId as string)
+    ?? '';
+
+  const userInfo: Record<string, unknown> = {
+    ...(tenantCtx.authoredUser ?? {}),
+    ...(refreshAppJson ?? {}),
+    ...(loginInfoJson ?? {}),
+    userId,
+    token: tenantCtx.token,
+    isLoggedin: true,
+    ...(tenantCtx.currTenantList ? { currTenantList: tenantCtx.currTenantList } : {}),
+  };
+
+  return {
+    token: tenantCtx.token,
+    userId,
+    userInfo,
   };
 }
 
@@ -151,12 +331,21 @@ const KEY_APP_TOKEN = 'digi-middleware-auth-app';
 
 export interface SessionUserInfo {
   userId: string;
-  tenantId: string;
-  loginTime: string;
+  userName?: string;
+  token: string;
+  tenantId?: string;
+  tenantName?: string;
+  tenantSid?: number;
+  sid?: number;
+  email?: string;
+  telephone?: string;
+  isLoggedin?: boolean;
+  currTenantList?: unknown[];
+  [key: string]: unknown;
 }
 
 /** 保存登录会话 */
-export function saveSession(token: string, info: SessionUserInfo): void {
+export function saveSession(token: string, info: Record<string, unknown>): void {
   sessionStorage.setItem(KEY_USER_TOKEN, token);
   sessionStorage.setItem(KEY_USER_INFO, JSON.stringify(info));
   sessionStorage.setItem(KEY_APP_TOKEN, APP_TOKEN);