diff --git a/frontend/mobile-app/lib/core/services/planting_service.dart b/frontend/mobile-app/lib/core/services/planting_service.dart
index 67f7dd2c..81ea4f2d 100644
--- a/frontend/mobile-app/lib/core/services/planting_service.dart
+++ b/frontend/mobile-app/lib/core/services/planting_service.dart
@@ -142,20 +142,28 @@ class PlantingService {
   /// 选择省市
   ///
   /// [orderNo] 订单号
+  /// [provinceCode] 省份代码
   /// [provinceName] 省份名称
+  /// [cityCode] 城市代码
   /// [cityName] 城市名称
   Future<PlantingOrder> selectProvinceCity(
-    String orderNo,
-    String provinceName,
-    String cityName,
-  ) async {
+    String orderNo, {
+    required String provinceCode,
+    required String provinceName,
+    required String cityCode,
+    required String cityName,
+  }) async {
     try {
-      debugPrint('[PlantingService] 选择省市: orderNo=$orderNo, province=$provinceName, city=$cityName');
+      debugPrint('[PlantingService] 选择省市: orderNo=$orderNo');
+      debugPrint('[PlantingService]   provinceCode=$provinceCode, provinceName=$provinceName');
+      debugPrint('[PlantingService]   cityCode=$cityCode, cityName=$cityName');
 
       final response = await _apiClient.post(
         '/planting/orders/$orderNo/select-province-city',
         data: {
+          'provinceCode': provinceCode,
           'provinceName': provinceName,
+          'cityCode': cityCode,
           'cityName': cityName,
         },
       );
diff --git a/frontend/mobile-app/lib/features/planting/presentation/pages/planting_location_page.dart b/frontend/mobile-app/lib/features/planting/presentation/pages/planting_location_page.dart
index e798f6df..d85cfbd4 100644
--- a/frontend/mobile-app/lib/features/planting/presentation/pages/planting_location_page.dart
+++ b/frontend/mobile-app/lib/features/planting/presentation/pages/planting_location_page.dart
@@ -123,11 +123,13 @@ class _PlantingLocationPageState extends ConsumerState<PlantingLocationPage> {
     try {
       final plantingService = ref.read(plantingServiceProvider);
 
-      // 1. 选择省市
+      // 1. 选择省市（需要传递代码和名称）
       await plantingService.selectProvinceCity(
         widget.orderNo,
-        _selectedProvinceName!,
-        _selectedCityName!,
+        provinceCode: _selectedProvinceCode!,
+        provinceName: _selectedProvinceName!,
+        cityCode: _selectedCityCode!,
+        cityName: _selectedCityName!,
       );
 
       // 2. 确认省市选择