diff --git a/frontend/mining-app/lib/core/network/api_client.dart b/frontend/mining-app/lib/core/network/api_client.dart
index 3508734b..8d3bcee0 100644
--- a/frontend/mining-app/lib/core/network/api_client.dart
+++ b/frontend/mining-app/lib/core/network/api_client.dart
@@ -5,7 +5,6 @@ import '../error/exceptions.dart';
 
 class ApiClient {
   final Dio dio;
-  String? _accessToken;
 
   ApiClient({required this.dio}) {
     dio.options = BaseOptions(
@@ -21,27 +20,17 @@ class ApiClient {
     // 添加请求拦截器，自动注入 token
     dio.interceptors.add(InterceptorsWrapper(
       onRequest: (options, handler) async {
-        if (_accessToken == null) {
-          // 从存储中加载 token
-          final prefs = await SharedPreferences.getInstance();
-          _accessToken = prefs.getString('access_token');
-        }
-        if (_accessToken != null) {
-          options.headers['Authorization'] = 'Bearer $_accessToken';
+        // 每次请求都从存储中读取最新的 token，确保登录后立即生效
+        final prefs = await SharedPreferences.getInstance();
+        final token = prefs.getString('access_token');
+        if (token != null && token.isNotEmpty) {
+          options.headers['Authorization'] = 'Bearer $token';
         }
         handler.next(options);
       },
     ));
   }
 
-  void setAccessToken(String? token) {
-    _accessToken = token;
-  }
-
-  void clearAccessToken() {
-    _accessToken = null;
-  }
-
   Future<Response> get(
     String path, {
     Map<String, dynamic>? queryParameters,