diff --git a/frontend/genex-mobile/lib/app/i18n/locale_manager.dart b/frontend/genex-mobile/lib/app/i18n/locale_manager.dart
index c75ea98..864ea36 100644
--- a/frontend/genex-mobile/lib/app/i18n/locale_manager.dart
+++ b/frontend/genex-mobile/lib/app/i18n/locale_manager.dart
@@ -1,12 +1,15 @@
 import 'package:flutter/material.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 /// 全局语言状态管理
 ///
 /// userLocale = null 时跟随系统语言
-/// 用户在设置页选择后，设置为具体 Locale
+/// 用户在设置页选择后，持久化到 SharedPreferences，下次启动自动恢复
 class LocaleManager {
   static final ValueNotifier<Locale?> userLocale = ValueNotifier(null);
 
+  static const _prefKey = 'user_locale';
+
   static const supportedLocales = [
     Locale('zh', 'CN'),
     Locale('zh', 'TW'),
@@ -14,6 +17,29 @@ class LocaleManager {
     Locale('ja'),
   ];
 
+  /// 启动时调用，从 SharedPreferences 恢复用户选择的语言
+  static Future<void> init() async {
+    final prefs = await SharedPreferences.getInstance();
+    final saved = prefs.getString(_prefKey);
+    if (saved != null) {
+      final locale = _parseLocale(saved);
+      if (locale != null) {
+        userLocale.value = locale;
+      }
+    }
+  }
+
+  /// 设置用户语言并持久化（传 null 表示恢复跟随系统）
+  static Future<void> setLocale(Locale? locale) async {
+    userLocale.value = locale;
+    final prefs = await SharedPreferences.getInstance();
+    if (locale == null) {
+      await prefs.remove(_prefKey);
+    } else {
+      await prefs.setString(_prefKey, _serializeLocale(locale));
+    }
+  }
+
   /// 根据系统 locale 解析最佳匹配
   static Locale resolve(List<Locale>? systemLocales, Iterable<Locale> supported) {
     if (systemLocales == null || systemLocales.isEmpty) {
@@ -71,4 +97,21 @@ class LocaleManager {
         return locale.toString();
     }
   }
+
+  static String _serializeLocale(Locale locale) {
+    if (locale.countryCode != null && locale.countryCode!.isNotEmpty) {
+      return '${locale.languageCode}_${locale.countryCode}';
+    }
+    return locale.languageCode;
+  }
+
+  static Locale? _parseLocale(String str) {
+    final parts = str.split('_');
+    if (parts.length == 2) {
+      return Locale(parts[0], parts[1]);
+    } else if (parts.length == 1 && parts[0].isNotEmpty) {
+      return Locale(parts[0]);
+    }
+    return null;
+  }
 }
diff --git a/frontend/genex-mobile/lib/features/profile/presentation/pages/settings_page.dart b/frontend/genex-mobile/lib/features/profile/presentation/pages/settings_page.dart
index 08dbd38..860f4b0 100644
--- a/frontend/genex-mobile/lib/features/profile/presentation/pages/settings_page.dart
+++ b/frontend/genex-mobile/lib/features/profile/presentation/pages/settings_page.dart
@@ -269,7 +269,7 @@ class _SettingsPageState extends State<SettingsPage> {
                         color: AppColors.primary, size: 22)
                     : null,
                 onTap: () {
-                  LocaleManager.userLocale.value = locale;
+                  LocaleManager.setLocale(locale);
                   setState(() {});
                   Navigator.pop(context);
                 },
diff --git a/frontend/genex-mobile/lib/main.dart b/frontend/genex-mobile/lib/main.dart
index 466325e..5df7989 100644
--- a/frontend/genex-mobile/lib/main.dart
+++ b/frontend/genex-mobile/lib/main.dart
@@ -52,6 +52,9 @@ Future<void> main() async {
   // 初始化通知徽章管理器
   NotificationBadgeManager().initialize();
 
+  // 恢复用户语言偏好（无选择时跟随系统语言）
+  await LocaleManager.init();
+
   runApp(const GenexConsumerApp());
 }
 
diff --git a/frontend/genex-mobile/pubspec.yaml b/frontend/genex-mobile/pubspec.yaml
index b61e74a..35b6aa1 100644
--- a/frontend/genex-mobile/pubspec.yaml
+++ b/frontend/genex-mobile/pubspec.yaml
@@ -22,6 +22,7 @@ dependencies:
   firebase_core: ^3.4.0
   flutter_local_notifications: ^18.0.0
   in_app_update: ^4.2.2
+  shared_preferences: ^2.2.3
 
 dev_dependencies:
   flutter_test: