diff --git a/apps/web-antd/src/api/core/sso.ts b/apps/web-antd/src/api/core/sso.ts
new file mode 100644
index 000000000..e0dfb0881
--- /dev/null
+++ b/apps/web-antd/src/api/core/sso.ts
@@ -0,0 +1,38 @@
+import { requestClient } from '#/api/request';
+
+/**
+ * SSO 单点登录相关接口（对接 /system/sso/callback）
+ * 用于从业务平台跳转过来时，用 code 换 IoT 平台的 access_token
+ */
+export namespace SsoApi {
+  export interface SsoCallbackResult {
+    access_token: string;
+    refresh_token: string;
+    expires_in: number;
+    token_type: string;
+  }
+}
+
+/**
+ * 用 SSO code 换 access_token
+ * client_secret 不在前端，由后端从配置读取
+ *
+ * @param clientId 当前系统的 client_id，IoT 平台固定为 iot（原 iot-client 已改名）
+ * @param code 授权码（从 URL 读取）
+ * @param redirectUri 回调地址（必须与发起授权时一致）
+ * @param state 发起授权时的随机串，从 URL 读出原样回传（CSRF 防护 + 校验一致性）
+ */
+export function ssoCallback(
+  clientId: string,
+  code: string,
+  redirectUri: string,
+  state?: string,
+) {
+  // 放 body 而非 query，避免 code 落入浏览器历史 / nginx access log
+  return requestClient.post<SsoApi.SsoCallbackResult>('/system/sso/callback', {
+    clientId,
+    code,
+    redirectUri,
+    state,
+  });
+}
diff --git a/apps/web-antd/src/api/request.ts b/apps/web-antd/src/api/request.ts
index 2568def87..5bf60dc6c 100644
--- a/apps/web-antd/src/api/request.ts
+++ b/apps/web-antd/src/api/request.ts
@@ -16,6 +16,7 @@ import { createApiEncrypt } from '@vben/utils';
 
 import { message } from 'ant-design-vue';
 
+import { IOT_CLIENT_ID } from '#/constants/sso';
 import { useAuthStore } from '#/store';
 
 import { refreshTokenApi } from './core';
@@ -23,6 +24,12 @@ import { refreshTokenApi } from './core';
 const { apiURL } = useAppConfig(import.meta.env, import.meta.env.PROD);
 const tenantEnable = isTenantEnable();
 const apiEncrypt = createApiEncrypt(import.meta.env);
+/**
+ * 前端身份（OAuth2 client_id）：后端 /system/auth/login & /refresh-token
+ * 按此值生成 token，并按 platform 过滤菜单（iot → platform=sys）。
+ * 走环境变量是为了让多个 apps 壳（antd/ele/naive/tdesign）各自声明。
+ */
+const clientId = import.meta.env.VITE_APP_CLIENT_ID || IOT_CLIENT_ID;
 
 function createRequestClient(baseURL: string, options?: RequestClientOptions) {
   const client = new RequestClient({
@@ -86,6 +93,13 @@ function createRequestClient(baseURL: string, options?: RequestClientOptions) {
       config.headers['visit-tenant-id'] = tenantEnable
         ? accessStore.visitTenantId
         : undefined;
+      // 添加项目编号（多项目切换）
+      // 仅在有值时设置，避免 axios 把 null 序列化为字符串 "null" 造成后端误判
+      if (accessStore.projectId != null) {
+        config.headers['project-id'] = accessStore.projectId;
+      }
+      // 声明前端身份（见文件顶部 clientId 注释）
+      config.headers['X-Client-Id'] = clientId;
 
       // 是否 API 加密
       if ((config.headers || {}).isEncrypt) {
@@ -182,6 +196,10 @@ baseRequestClient.addRequestInterceptor({
     config.headers['visit-tenant-id'] = tenantEnable
       ? accessStore.visitTenantId
       : undefined;
+    if (accessStore.projectId != null) {
+      config.headers['project-id'] = accessStore.projectId;
+    }
+    config.headers['X-Client-Id'] = clientId;
     return config;
   },
 });
diff --git a/apps/web-antd/src/api/system/project/index.ts b/apps/web-antd/src/api/system/project/index.ts
new file mode 100644
index 000000000..c791dfd1b
--- /dev/null
+++ b/apps/web-antd/src/api/system/project/index.ts
@@ -0,0 +1,21 @@
+import { requestClient } from '#/api/request';
+
+export namespace SystemProjectApi {
+  export interface Project {
+    id?: number;
+    name: string;
+    code: string;
+    status: number;
+    contactName?: string;
+    contactMobile?: string;
+    address?: string;
+    remark?: string;
+    createTime?: Date;
+  }
+}
+
+export function getSimpleProjectList() {
+  return requestClient.get<SystemProjectApi.Project[]>(
+    '/system/project/simple-list',
+  );
+}
diff --git a/apps/web-antd/src/constants/sso.ts b/apps/web-antd/src/constants/sso.ts
new file mode 100644
index 000000000..fe14e2130
--- /dev/null
+++ b/apps/web-antd/src/constants/sso.ts
@@ -0,0 +1,34 @@
+/**
+ * SSO / OAuth2 相关常量
+ *
+ * 集中维护 client_id、state 存储 key 等跨文件复用的字符串，避免魔法字符串散落。
+ */
+
+/** 本平台（物联运维）在芋道后端登记的 OAuth2 客户端编号 */
+export const IOT_CLIENT_ID = 'iot';
+
+/** 业务平台在芋道后端登记的 OAuth2 客户端编号 */
+export const BIZ_CLIENT_ID = 'biz';
+
+/** 跳业务平台发起 OAuth2 授权时，state 写入 sessionStorage 的 key */
+export const SSO_STATE_STORAGE_KEY = 'sso:biz:state';
+
+/** 本平台自身 SSO 回调页面路径 */
+export const SSO_CALLBACK_PATH = '/sso-callback';
+
+/**
+ * 生成一个密码学安全的随机 state。
+ * 首选 crypto.randomUUID；低版本浏览器回退 getRandomValues。
+ */
+export function generateOauthState(): string {
+  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
+    return crypto.randomUUID();
+  }
+  if (typeof crypto !== 'undefined' && crypto.getRandomValues) {
+    const arr = new Uint8Array(16);
+    crypto.getRandomValues(arr);
+    return Array.from(arr, (b) => b.toString(16).padStart(2, '0')).join('');
+  }
+  // 极端降级：不会加密但比 Math.random 多一层时间戳
+  return `${Date.now().toString(36)}-${Math.random().toString(36).slice(2)}`;
+}
diff --git a/apps/web-antd/src/layouts/basic.vue b/apps/web-antd/src/layouts/basic.vue
index e8715a895..5eaadc18d 100644
--- a/apps/web-antd/src/layouts/basic.vue
+++ b/apps/web-antd/src/layouts/basic.vue
@@ -1,14 +1,13 @@
 <script lang="ts" setup>
 import type { NotificationItem } from '@vben/layouts';
 
-import type { SystemTenantApi } from '#/api/system/tenant';
+import type { SystemProjectApi } from '#/api/system/project';
 
-import { computed, onMounted, ref, watch } from 'vue';
+import { computed, onMounted, onUnmounted, ref, watch } from 'vue';
 
-import { useAccess } from '@vben/access';
 import { AuthenticationLoginExpiredModal, useVbenModal } from '@vben/common-ui';
 import { VBEN_DOC_URL, VBEN_GITHUB_URL } from '@vben/constants';
-import { isTenantEnable, useTabs, useWatermark } from '@vben/hooks';
+import { useTabs, useWatermark } from '@vben/hooks';
 import {
   AntdProfileOutlined,
   BookOpenText,
@@ -20,7 +19,7 @@ import {
   Help,
   LockScreen,
   Notification,
-  TenantDropdown,
+  ProjectDropdown,
   UserDropdown,
 } from '@vben/layouts';
 import { preferences } from '@vben/preferences';
@@ -35,7 +34,14 @@ import {
   updateAllNotifyMessageRead,
   updateNotifyMessageRead,
 } from '#/api/system/notify/message';
-import { getSimpleTenantList } from '#/api/system/tenant';
+import { authorize } from '#/api/system/oauth2/open';
+import { getSimpleProjectList } from '#/api/system/project';
+import {
+  BIZ_CLIENT_ID,
+  generateOauthState,
+  SSO_CALLBACK_PATH,
+  SSO_STATE_STORAGE_KEY,
+} from '#/constants/sso';
 import { $t } from '#/locales';
 import { router } from '#/router';
 import { useAuthStore } from '#/store';
@@ -44,7 +50,6 @@ import LoginForm from '#/views/_core/authentication/login.vue';
 const userStore = useUserStore();
 const authStore = useAuthStore();
 const accessStore = useAccessStore();
-const { hasAccessByCodes } = useAccess();
 const { destroyWatermark, updateWatermark } = useWatermark();
 const { closeOtherTabs, refreshTab } = useTabs();
 
@@ -155,43 +160,116 @@ function handleNotificationOpen(open: boolean) {
   handleNotificationGetUnreadCount();
 }
 
-// 租户列表
-const tenants = ref<SystemTenantApi.Tenant[]>([]);
-const tenantEnable = computed(
-  () => hasAccessByCodes(['system:tenant:visit']) && isTenantEnable(),
+// ========== 项目切换 ==========
+const projects = ref<SystemProjectApi.Project[]>([]);
+const projectListReady = ref(false);
+/**
+ * 是否允许展示项目切换组件：
+ * - 列表拉取成功且至少一项
+ * - 拉取失败或用户无权限时（后端 403 会被拦截器吃掉），列表为空 → 隐藏控件
+ * TODO: 后端如果补上 system:project:query 权限码，这里换成 hasAccessByCodes 更直接
+ */
+const canSwitchProject = computed(
+  () => projectListReady.value && projects.value.length > 0,
 );
 
-/** 获取租户列表 */
-async function handleGetTenantList() {
-  if (tenantEnable.value) {
-    tenants.value = await getSimpleTenantList();
+/** 获取项目列表 */
+async function handleGetProjectList() {
+  try {
+    projects.value = await getSimpleProjectList();
+    if (!accessStore.projectId && projects.value.length > 0) {
+      const first = projects.value[0];
+      if (first?.id) {
+        accessStore.setProjectId(first.id as number);
+      }
+    }
+  } catch (error) {
+    console.error('getSimpleProjectList failed', error);
+    message.warning('项目列表加载失败，项目切换功能暂不可用');
+    projects.value = [];
+  } finally {
+    projectListReady.value = true;
   }
 }
 
-/** 处理租户切换 */
-async function handleTenantChange(tenant: SystemTenantApi.Tenant) {
-  if (!tenant || !tenant.id) {
-    message.error('切换租户失败');
+/** 跳转到业务平台（OAuth2 授权码无感跳转） */
+const bizLoading = ref(false);
+async function handleGoToBiz() {
+  if (bizLoading.value) return;
+  // 生产环境若没配 VITE_BIZ_BASE_URL，直接提示，不要悄悄跳 localhost
+  const bizBaseUrl = import.meta.env.VITE_BIZ_BASE_URL;
+  if (!bizBaseUrl) {
+    message.error('业务平台地址未配置（VITE_BIZ_BASE_URL），请联系管理员');
+    return;
+  }
+
+  bizLoading.value = true;
+  try {
+    const redirectUri = `${bizBaseUrl}${SSO_CALLBACK_PATH}`;
+    const state = generateOauthState();
+    // 存起来供对端回跳后（如部署在同域下）校验；backend 也会独立校验一次
+    try {
+      sessionStorage.setItem(SSO_STATE_STORAGE_KEY, state);
+    } catch {
+      // 存储配额/隐私模式下写入失败，走后端校验即可
+    }
+
+    const redirectUrl = await authorize(
+      'code',
+      BIZ_CLIENT_ID,
+      redirectUri,
+      state,
+      true, // auto_approve 跳过授权确认页
+      ['user.read', 'user.write'],
+      [],
+    );
+    if (!redirectUrl) {
+      message.error('获取授权失败，请重试');
+      return;
+    }
+    window.location.href = redirectUrl;
+  } catch (error: any) {
+    console.error('goToBiz failed', error);
+    message.error(error?.message ?? '跳转业务平台失败');
+  } finally {
+    bizLoading.value = false;
+  }
+}
+
+/** 处理项目切换 */
+async function handleProjectChange(project: SystemProjectApi.Project) {
+  if (!project || !project.id) {
+    message.error('切换项目失败');
+    return;
+  }
+  if (project.id === accessStore.projectId) {
+    return;
+  }
+  // 设置当前项目 ID（axios 拦截器会自动带 project-id 请求头）
+  accessStore.setProjectId(project.id as number);
+  // 不同项目可能对应不同菜单/按钮权限，重新拉一次用户信息；失败就回滚选择
+  try {
+    await authStore.fetchUserInfo();
+  } catch (error) {
+    console.error('fetchUserInfo after project switch failed', error);
+    message.error('切换项目后刷新权限失败，请重新登录');
     return;
   }
-  // 设置访问租户 ID
-  accessStore.setVisitTenantId(tenant.id as number);
-  // 关闭其他标签页，只保留当前页
   await closeOtherTabs();
-  // 刷新当前页面
   await refreshTab();
-  // 提示切换成功
-  message.success(`切换当前租户为: ${tenant.name}`);
+  message.success(`切换当前项目为: ${project.name}`);
 }
 
 // ========== 初始化 ==========
+let unreadCountTimer: null | ReturnType<typeof setInterval> = null;
+
 onMounted(() => {
   // 首次加载未读数量
   handleNotificationGetUnreadCount();
-  // 获取租户列表
-  handleGetTenantList();
+  // 获取项目列表
+  handleGetProjectList();
   // 轮询刷新未读数量
-  setInterval(
+  unreadCountTimer = setInterval(
     () => {
       if (userStore.userInfo) {
         handleNotificationGetUnreadCount();
@@ -201,6 +279,13 @@ onMounted(() => {
   );
 });
 
+onUnmounted(() => {
+  if (unreadCountTimer) {
+    clearInterval(unreadCountTimer);
+    unreadCountTimer = null;
+  }
+});
+
 watch(
   () => ({
     enable: preferences.app.watermark,
@@ -247,14 +332,26 @@ watch(
       />
     </template>
     <template #header-right-1>
-      <div v-if="tenantEnable">
-        <TenantDropdown
-          class="mr-2"
-          :tenant-list="tenants"
-          :visit-tenant-id="accessStore.visitTenantId"
-          @success="handleTenantChange"
-        />
-      </div>
+      <ProjectDropdown
+        v-if="canSwitchProject"
+        class="mr-2"
+        :project-list="projects"
+        :visit-project-id="accessStore.projectId"
+        @success="handleProjectChange"
+      />
+    </template>
+    <template #header-right-2>
+      <a
+        class="biz-portal-btn ml-1 mr-2 flex h-8 cursor-pointer items-center gap-1.5 rounded-full px-4 text-sm font-medium text-white shadow-sm transition-all hover:shadow-md"
+        :class="{ 'pointer-events-none opacity-60': bizLoading }"
+        role="button"
+        title="返回业务平台"
+        @click="handleGoToBiz"
+      >
+        <span class="i-lucide:briefcase text-base"></span>
+        <span>业务平台</span>
+        <span class="i-lucide:arrow-up-right text-xs opacity-80"></span>
+      </a>
     </template>
     <template #extra>
       <AuthenticationLoginExpiredModal
@@ -270,3 +367,16 @@ watch(
   </BasicLayout>
   <HelpModal />
 </template>
+
+<style scoped>
+/* 业务平台按钮颜色，走变量便于后续接入主题系统 */
+.biz-portal-btn {
+  --biz-btn-bg: #fa8c16;
+  --biz-btn-bg-hover: #ffa940;
+  background-color: var(--biz-btn-bg);
+}
+.biz-portal-btn:hover {
+  background-color: var(--biz-btn-bg-hover);
+  color: #fff;
+}
+</style>
diff --git a/apps/web-antd/src/router/routes/core.ts b/apps/web-antd/src/router/routes/core.ts
index 5a749a51e..662dfb0bd 100644
--- a/apps/web-antd/src/router/routes/core.ts
+++ b/apps/web-antd/src/router/routes/core.ts
@@ -122,6 +122,30 @@ const coreRoutes: RouteRecordRaw[] = [
       ignoreAccess: true,
     },
   },
+  // SSO 回调页，业务平台跳过来时落地的页面
+  {
+    name: 'SsoCallback',
+    path: '/sso-callback',
+    component: () => import('#/views/_core/authentication/sso-callback.vue'),
+    // 没带 code 直接手输入 URL 到这里会进死循环，这里先挡一层
+    beforeEnter: (to, _from, next) => {
+      if (!to.query.code) {
+        next({
+          path: LOGIN_PATH,
+          query: { ssoError: '缺少授权码，无法完成 SSO 登录' },
+        });
+        return;
+      }
+      next();
+    },
+    meta: {
+      hideInBreadcrumb: true,
+      hideInMenu: true,
+      hideInTab: true,
+      ignoreAccess: true,
+      title: 'SSO 登录中',
+    },
+  },
 ];
 
 export { coreRoutes, fallbackNotFoundRoute };
diff --git a/apps/web-antd/src/store/auth.ts b/apps/web-antd/src/store/auth.ts
index dcef71175..8b07968d7 100644
--- a/apps/web-antd/src/store/auth.ts
+++ b/apps/web-antd/src/store/auth.ts
@@ -29,6 +29,41 @@ export const useAuthStore = defineStore('auth', () => {
 
   const loginLoading = ref(false);
 
+  /**
+   * 登录流程的公共收尾：落 token → 拉用户信息 → 跳首页 → 成功通知。
+   * 所有入口（密码/短信/社交/SSO）拿到 token 后都走这里，保持行为一致。
+   */
+  async function completeLogin(
+    accessToken: string,
+    refreshToken: string,
+    onSuccess?: () => Promise<void> | void,
+  ): Promise<null | UserInfo> {
+    accessStore.setAccessToken(accessToken);
+    accessStore.setRefreshToken(refreshToken);
+
+    const fetchUserInfoResult = await fetchUserInfo();
+    const userInfo = fetchUserInfoResult.user;
+
+    if (accessStore.loginExpired) {
+      accessStore.setLoginExpired(false);
+    } else {
+      onSuccess
+        ? await onSuccess?.()
+        : await router.push(
+            userInfo.homePath || preferences.app.defaultHomePath,
+          );
+    }
+
+    if (userInfo?.nickname) {
+      notification.success({
+        description: `${$t('authentication.loginSuccessDesc')}:${userInfo?.nickname}`,
+        duration: 3,
+        message: $t('authentication.loginSuccess'),
+      });
+    }
+    return userInfo;
+  }
+
   /**
    * 异步处理登录操作
    * Asynchronously handle the login process
@@ -41,7 +76,6 @@ export const useAuthStore = defineStore('auth', () => {
     params: Recordable<any>,
     onSuccess?: () => Promise<void> | void,
   ) {
-    // 异步处理用户登录操作并获取 accessToken
     let userInfo: null | UserInfo = null;
     try {
       let loginResult: AuthApi.LoginResult;
@@ -64,47 +98,36 @@ export const useAuthStore = defineStore('auth', () => {
         }
       }
       const { accessToken, refreshToken } = loginResult;
-
-      // 如果成功获取到 accessToken
       if (accessToken) {
-        accessStore.setAccessToken(accessToken);
-        accessStore.setRefreshToken(refreshToken);
-
-        // 获取用户信息并存储到 userStore、accessStore 中
-        // TODO @芋艿：清理掉 accessCodes 相关的逻辑
-        // const [fetchUserInfoResult, accessCodes] = await Promise.all([
-        //   fetchUserInfo(),
-        //   // getAccessCodesApi(),
-        // ]);
-        const fetchUserInfoResult = await fetchUserInfo();
-
-        userInfo = fetchUserInfoResult.user;
-
-        if (accessStore.loginExpired) {
-          accessStore.setLoginExpired(false);
-        } else {
-          onSuccess
-            ? await onSuccess?.()
-            : await router.push(
-                userInfo.homePath || preferences.app.defaultHomePath,
-              );
-        }
-
-        if (userInfo?.nickname) {
-          notification.success({
-            description: `${$t('authentication.loginSuccessDesc')}:${userInfo?.nickname}`,
-            duration: 3,
-            message: $t('authentication.loginSuccess'),
-          });
-        }
+        userInfo = await completeLogin(accessToken, refreshToken, onSuccess);
       }
     } finally {
       loginLoading.value = false;
     }
+    return { userInfo };
+  }
 
-    return {
-      userInfo,
-    };
+  /**
+   * SSO 登录：从业务平台跳转过来时，已经拿到 access_token，跳过密码校验
+   */
+  async function ssoLogin(
+    accessToken: string,
+    refreshToken: string,
+    onSuccess?: () => Promise<void> | void,
+  ) {
+    let userInfo: null | UserInfo = null;
+    try {
+      loginLoading.value = true;
+      // SSO 首次进入时，store 可能尚未水合出 visitTenantId，这里用 tenantId 兜底，
+      // 避免第一屏接口因缺少 visit-tenant-id 被后端拒绝。
+      if (accessStore.tenantId && !accessStore.visitTenantId) {
+        accessStore.setVisitTenantId(accessStore.tenantId);
+      }
+      userInfo = await completeLogin(accessToken, refreshToken, onSuccess);
+    } finally {
+      loginLoading.value = false;
+    }
+    return { userInfo };
   }
 
   async function logout(redirect: boolean = true) {
@@ -150,6 +173,7 @@ export const useAuthStore = defineStore('auth', () => {
   return {
     $reset,
     authLogin,
+    ssoLogin,
     fetchUserInfo,
     loginLoading,
     logout,
diff --git a/apps/web-antd/src/views/_core/authentication/sso-callback.vue b/apps/web-antd/src/views/_core/authentication/sso-callback.vue
new file mode 100644
index 000000000..c22bbf0de
--- /dev/null
+++ b/apps/web-antd/src/views/_core/authentication/sso-callback.vue
@@ -0,0 +1,90 @@
+<script lang="ts" setup>
+import { onMounted, ref } from 'vue';
+import { useRoute, useRouter } from 'vue-router';
+
+import { LOGIN_PATH } from '@vben/constants';
+
+import { message } from 'ant-design-vue';
+
+import { ssoCallback } from '#/api/core/sso';
+import {
+  IOT_CLIENT_ID,
+  SSO_CALLBACK_PATH,
+} from '#/constants/sso';
+import { useAuthStore } from '#/store';
+
+/**
+ * IoT 运维平台 SSO 回调页
+ *
+ * 场景：从业务平台跳转过来时，URL 会带上 code 参数：
+ *   iot.xxx.com/sso-callback?code=xxx&state=yyy
+ *
+ * 本页的职责：
+ * 1. 从 URL 读取 code
+ * 2. 调 /system/sso/callback 用 code 换 IoT 平台的 access_token
+ * 3. 走 authStore.ssoLogin 完成登录流程（拉用户信息、菜单）
+ * 4. 跳首页
+ *
+ * 注：state 校验由后端完成（授权时存入、回调时比对）。
+ */
+defineOptions({ name: 'SsoCallback' });
+
+const route = useRoute();
+const router = useRouter();
+const authStore = useAuthStore();
+
+const errorMsg = ref<string>('');
+
+async function redirectToLogin(reason: string) {
+  errorMsg.value = reason;
+  message.error(reason);
+  await router.replace({
+    path: LOGIN_PATH,
+    query: { ssoError: reason },
+  });
+}
+
+onMounted(async () => {
+  const code = route.query.code as string | undefined;
+  if (!code) {
+    await redirectToLogin('SSO 登录失败：缺少授权码');
+    return;
+  }
+
+  try {
+    const redirectUri = `${window.location.origin}${SSO_CALLBACK_PATH}`;
+    // state 必须从 URL 原样回传，否则后端会抛 OAUTH2_GRANT_STATE_MISMATCH
+    const state = (route.query.state as string) || undefined;
+
+    const devTiming = import.meta.env.DEV ? performance.now() : 0;
+    const tokenResp = await ssoCallback(IOT_CLIENT_ID, code, redirectUri, state);
+
+    if (import.meta.env.DEV) {
+      // eslint-disable-next-line no-console
+      console.debug(
+        `[SSO] ssoCallback 耗时 ${(performance.now() - devTiming).toFixed(0)}ms`,
+      );
+    }
+
+    await authStore.ssoLogin(tokenResp.access_token, tokenResp.refresh_token);
+
+    if (import.meta.env.DEV) {
+      // eslint-disable-next-line no-console
+      console.debug(
+        `[SSO] 总耗时 ${(performance.now() - devTiming).toFixed(0)}ms`,
+      );
+    }
+  } catch (error: any) {
+    // 真实异常保留 console.error，方便排障
+    console.error('SSO callback failed', error);
+    await redirectToLogin(error?.message ?? 'SSO 登录失败，请重新登录');
+  }
+});
+</script>
+
+<template>
+  <div class="flex h-screen items-center justify-center text-base">
+    <span v-if="errorMsg">{{ errorMsg }}</span>
+    <span v-else>正在登录，请稍候...</span>
+  </div>
+</template>
diff --git a/packages/effects/layouts/src/widgets/index.ts b/packages/effects/layouts/src/widgets/index.ts
index 665cdb9e9..7d6eccdb6 100644
--- a/packages/effects/layouts/src/widgets/index.ts
+++ b/packages/effects/layouts/src/widgets/index.ts
@@ -8,6 +8,7 @@ export { default as AuthenticationLayoutToggle } from './layout-toggle.vue';
 export * from './lock-screen';
 export * from './notification';
 export * from './preferences';
+export * from './project-dropdown';
 export * from './tenant-dropdown';
 export * from './theme-toggle';
 export * from './timezone';
diff --git a/packages/effects/layouts/src/widgets/project-dropdown/index.ts b/packages/effects/layouts/src/widgets/project-dropdown/index.ts
new file mode 100644
index 000000000..8ae16ff57
--- /dev/null
+++ b/packages/effects/layouts/src/widgets/project-dropdown/index.ts
@@ -0,0 +1 @@
+export { default as ProjectDropdown } from './project-dropdown.vue';
diff --git a/packages/effects/layouts/src/widgets/project-dropdown/project-dropdown.vue b/packages/effects/layouts/src/widgets/project-dropdown/project-dropdown.vue
new file mode 100644
index 000000000..89fc7c4ae
--- /dev/null
+++ b/packages/effects/layouts/src/widgets/project-dropdown/project-dropdown.vue
@@ -0,0 +1,84 @@
+<script lang="ts" setup>
+import { computed } from 'vue';
+
+import { IconifyIcon } from '@vben/icons';
+
+import {
+  Button,
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuGroup,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+} from '@vben-core/shadcn-ui';
+
+interface Project {
+  id?: number;
+  name: string;
+  code?: string;
+  status?: number;
+}
+
+defineOptions({
+  name: 'ProjectDropdown',
+});
+
+const props = defineProps<{
+  projectList?: Project[];
+  visitProjectId?: null | number;
+}>();
+
+const emit = defineEmits(['success']);
+
+const projects = computed(() => props.projectList ?? []);
+
+async function handleChange(id: number | undefined) {
+  if (!id) {
+    return;
+  }
+  const project = projects.value.find((item) => item.id === id);
+  emit('success', project);
+}
+</script>
+<template>
+  <DropdownMenu>
+    <DropdownMenuTrigger>
+      <Button
+        variant="outline"
+        class="hover:bg-accent ml-1 mr-2 h-8 w-32 cursor-pointer rounded-full p-1.5"
+      >
+        <IconifyIcon icon="lucide:folder-kanban" class="mr-2" />
+        {{
+          projects.find((item) => item.id === visitProjectId)?.name ||
+          '请选择项目'
+        }}
+      </Button>
+    </DropdownMenuTrigger>
+    <DropdownMenuContent class="w-40 p-0 pb-1">
+      <DropdownMenuGroup>
+        <DropdownMenuItem
+          v-for="project in projects"
+          :key="project.id"
+          :disabled="project.id === visitProjectId"
+          class="mx-1 flex cursor-pointer items-center rounded-sm py-1 leading-8"
+          @click="handleChange(project.id)"
+        >
+          <template v-if="project.id === visitProjectId">
+            <IconifyIcon icon="lucide:check" class="mr-2" />
+            {{ project.name }}
+          </template>
+          <template v-else>
+            {{ project.name }}
+          </template>
+        </DropdownMenuItem>
+        <DropdownMenuItem
+          v-if="projects.length === 0"
+          disabled
+          class="mx-1 flex cursor-default items-center rounded-sm py-1 leading-8 text-xs opacity-60"
+        >
+          暂无项目
+        </DropdownMenuItem>
+      </DropdownMenuGroup>
+    </DropdownMenuContent>
+  </DropdownMenu>
+</template>
diff --git a/packages/stores/src/modules/access.ts b/packages/stores/src/modules/access.ts
index 785fffdff..c4ab92eff 100644
--- a/packages/stores/src/modules/access.ts
+++ b/packages/stores/src/modules/access.ts
@@ -39,6 +39,10 @@ interface AccessState {
    * 登录是否过期
    */
   loginExpired: boolean;
+  /**
+   * 当前项目编号
+   */
+  projectId: null | number;
   /**
    * 登录 accessToken
    */
@@ -102,6 +106,9 @@ export const useAccessStore = defineStore('core-access', {
     setRefreshToken(token: AccessToken) {
       this.refreshToken = token;
     },
+    setProjectId(projectId: null | number) {
+      this.projectId = projectId;
+    },
     setTenantId(tenantId: null | number) {
       this.tenantId = tenantId;
     },
@@ -121,6 +128,7 @@ export const useAccessStore = defineStore('core-access', {
       'accessCodes',
       'tenantId',
       'visitTenantId',
+      'projectId',
       'isLockScreen',
       'lockScreenPassword',
     ],
@@ -134,6 +142,7 @@ export const useAccessStore = defineStore('core-access', {
     isLockScreen: false,
     lockScreenPassword: undefined,
     loginExpired: false,
+    projectId: null,
     refreshToken: null,
     tenantId: null,
     visitTenantId: null,