diff --git a/src/api/auth.ts b/src/api/auth.ts
index c4145a9..0acc75b 100644
--- a/src/api/auth.ts
+++ b/src/api/auth.ts
@@ -1,5 +1,5 @@
 import { api, setToken } from "@/api/client";
-import type { Identity, LoginResponse } from "@/types";
+import type { LoginResponse } from "@/types";
 
 export async function login(username: string, password: string): Promise<LoginResponse> {
   const res = await api.post<LoginResponse>("/auth/login", { username, password });
@@ -7,14 +7,6 @@ export async function login(username: string, password: string): Promise<LoginRe
   return res;
 }
 
-export async function selectIdentity(identityId: string): Promise<LoginResponse> {
-  const res = await api.post<LoginResponse>("/auth/select-identity", {
-    identity_id: identityId,
-  });
-  setToken(res.token);
-  return res;
-}
-
 // ---- 四种登录：短信验证码 / 微信扫码 / 小程序扫码 ----
 
 export async function sendCode(phone: string): Promise<{ sent: boolean; message: string; stub_code?: string }> {
@@ -64,7 +56,7 @@ export async function fetchMe(): Promise<Record<string, unknown>> {
   return api.get("/auth/me");
 }
 
-export function getSavedUser(): { username?: string; role?: string; identity?: Identity } | null {
+export function getSavedUser(): { username?: string; role?: string } | null {
   try {
     return JSON.parse(localStorage.getItem("@cloud-opc-admin/user") || "null");
   } catch {
@@ -72,7 +64,7 @@ export function getSavedUser(): { username?: string; role?: string; identity?: I
   }
 }
 
-export function saveUser(user: { username?: string; role?: string; identity?: Identity } | null) {
+export function saveUser(user: { username?: string; role?: string } | null) {
   if (user) localStorage.setItem("@cloud-opc-admin/user", JSON.stringify(user));
   else localStorage.removeItem("@cloud-opc-admin/user");
 }
diff --git a/src/lib/auth.tsx b/src/lib/auth.tsx
index b7fd8a5..491aab1 100644
--- a/src/lib/auth.tsx
+++ b/src/lib/auth.tsx
@@ -2,13 +2,11 @@ import * as React from "react";
 import { api, setToken as persistToken } from "@/api/client";
 import * as authApi from "@/api/auth";
 import { clearParkAuth } from "@/lib/parkAuth";
-import type { Identity, LoginResponse } from "@/types";
+import type { LoginResponse } from "@/types";
 
 interface AuthState {
   token: string | null;
   user: LoginResponse | null;
-  identities: Identity[];
-  currentIdentity: Identity | null;
 }
 
 interface AuthContextValue extends AuthState {
@@ -28,29 +26,20 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
     typeof window === "undefined" ? null : (localStorage.getItem("cloud_opc_admin_token") ?? null),
   );
   const [user, setUser] = React.useState<LoginResponse | null>(null);
-  const [identities, setIdentities] = React.useState<Identity[]>([]);
-  const [currentIdentity, setCurrentIdentity] = React.useState<Identity | null>(null);
 
   // 启动/刷新时若有 token：先本地还原 saved user（立即有 role，避免「无权限」闪屏），
-  // 再调 /auth/me 从后端还原权威身份（identities / 当前身份 / permissions）。
+  // 再调 /auth/me 从后端还原权威身份（role / permissions，账号单一角色）。
   React.useEffect(() => {
     if (!token) return;
     const saved = authApi.getSavedUser();
     if (saved?.username) {
       setUser((u) => ({ ...(u ?? {}), username: saved.username, role: saved.role } as LoginResponse));
-      if (saved.identity) setCurrentIdentity(saved.identity);
     }
     authApi
       .fetchMe()
       .then((res) => {
         const r = res as unknown as LoginResponse;
-        const identities = r.identities ?? [];
         setUser((u) => ({ ...(u ?? {}), username: r.username ?? u?.username, role: r.role ?? u?.role, ...r }));
-        if (identities.length) setIdentities(identities);
-        const current = identities.find((i) => i.id === r.identity_id);
-        if (current) setCurrentIdentity(current);
-        else if (saved?.identity) setCurrentIdentity(saved.identity);
-        else if (identities[0]) setCurrentIdentity(identities[0]);
       })
       .catch(() => { /* 401 时 api client 已触发 auth:expired → 登出 */ });
     // eslint-disable-next-line react-hooks/exhaustive-deps
@@ -81,17 +70,12 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
     if (res.token) persistToken(res.token);
     setToken(res.token);
     setUser(res);
-    setIdentities(res.identities ?? []);
-    const current = res.identities?.find((i) => i.id === res.identity_id) || null;
-    setCurrentIdentity(current || (res.identities?.[0] ?? null));
-    authApi.saveUser({ username: res.username, role: current?.role || res.role, identity: current || undefined });
+    authApi.saveUser({ username: res.username, role: res.role });
   }
 
   function logout() {
     setToken(null);
     setUser(null);
-    setIdentities([]);
-    setCurrentIdentity(null);
     localStorage.removeItem("cloud_opc_admin_token");
     authApi.saveUser(null);
     clearParkAuth(); // 一并清除园区端(园区账密)登录态，避免回跳 /park 死循环
@@ -101,10 +85,8 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
   const value: AuthContextValue = {
     token,
     user,
-    identities,
-    currentIdentity,
     isAuthed: !!token,
-    // 账号单一角色：role 恒取账号真实类型(user.role)，不再多身份/currentIdentity。
+    // 账号单一角色：role 恒取账号真实类型(user.role)。
     role: user?.role || null,
     permissions: user?.permissions ?? [],
     username: user?.username ?? null,
diff --git a/src/types.ts b/src/types.ts
index df76797..1a23920 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,19 +1,5 @@
-export interface Identity {
-  id: string;
-  port: string;
-  role: string;
-  sub_role?: string | null;
-  name?: string;
-  org_id?: string | null;
-  region_id?: string | null;
-  org_name?: string | null;
-  region_name?: string | null;
-  status: string;
-}
-
 export interface LoginResponse {
   token: string;
-  identities: Identity[];
   username?: string;
   nickname?: string;
   avatar?: string;
@@ -24,9 +10,6 @@ export interface LoginResponse {
   permissions?: string[];
   scope_region_ids?: string[];
   scope_level?: string;
-  identity_id?: string;
-  port?: string;
-  identity_name?: string;
 }
 
 // ---- 管理业务模型（server-core /admin/* 端点，部分端点尚未实现）----