diff --git a/backend/services/planting-service/src/pre-planting/application/services/pre-planting-reward.service.ts b/backend/services/planting-service/src/pre-planting/application/services/pre-planting-reward.service.ts
index b2c92ba9..92f41bce 100644
--- a/backend/services/planting-service/src/pre-planting/application/services/pre-planting-reward.service.ts
+++ b/backend/services/planting-service/src/pre-planting/application/services/pre-planting-reward.service.ts
@@ -151,6 +151,17 @@ export class PrePlantingRewardService {
     const allocations: RewardAllocation[] = [];
     const multiplier = portionCount;
 
+    // [2026-03-01] 标准化省市代码为 6 位格式
+    // 预种 DTO 接收前端传入的短格式（省 2 位如 "44"，市 4 位如 "4401"），
+    // 但 authorization-service 查询和系统账户编号都需要 6 位格式（"440000"/"440100"）。
+    // 正常认种 SelectProvinceCityDto 直接接收 6 位格式，故不存在此问题。
+    const stdProvinceCode = provinceCode.length < 6
+      ? provinceCode.padEnd(6, '0')
+      : provinceCode;
+    const stdCityCode = cityCode.length < 6
+      ? cityCode.padEnd(6, '0')
+      : cityCode;
+
     // ===== 4 类系统费用（硬编码，无需查询） =====
     allocations.push({
       recipientAccountSequence: SYSTEM_ACCOUNTS.COST,
@@ -196,9 +207,9 @@ export class PrePlantingRewardService {
     ] = await Promise.all([
       this.referralClient.getReferralChain(accountSequence),
       this.authorizationClient.getCommunityDistribution(accountSequence),
-      this.authorizationClient.getProvinceAreaDistribution(provinceCode),
+      this.authorizationClient.getProvinceAreaDistribution(stdProvinceCode),
       this.authorizationClient.getProvinceTeamDistribution(accountSequence),
-      this.authorizationClient.getCityAreaDistribution(cityCode),
+      this.authorizationClient.getCityAreaDistribution(stdCityCode),
       this.authorizationClient.getCityTeamDistribution(accountSequence),
     ]);
 
diff --git a/backend/services/planting-service/src/pre-planting/infrastructure/external/pre-planting-authorization.client.ts b/backend/services/planting-service/src/pre-planting/infrastructure/external/pre-planting-authorization.client.ts
index f85c4c2e..51e737d3 100644
--- a/backend/services/planting-service/src/pre-planting/infrastructure/external/pre-planting-authorization.client.ts
+++ b/backend/services/planting-service/src/pre-planting/infrastructure/external/pre-planting-authorization.client.ts
@@ -67,7 +67,7 @@ export class PrePlantingAuthorizationClient {
    * [2026-02-28] 修复：
    * 1. 传 treeCount=0（预种阶段不计入省公司月度考核，等合成1棵树后再累计）
    * 2. 正确解析 { distributions: [{accountSequence, ...}] } 返回格式（之前错误地期望 { accountSequence }）
-   * 3. fallback 路径添加 padStart(6,'0')，确保生成 7 位标准格式（如 9440000 而非 944）
+   * 3. fallback 路径使用 padEnd(6,'0') 右补零，确保生成 7 位标准格式（如 9440000）
    */
   async getProvinceAreaDistribution(
     provinceCode: string,
@@ -102,7 +102,7 @@ export class PrePlantingAuthorizationClient {
         `Failed to get province area distribution for ${provinceCode}, fallback to system province account`,
       );
       return {
-        recipientAccountSequence: `9${provinceCode.padStart(6, '0')}`,
+        recipientAccountSequence: `9${provinceCode.padEnd(6, '0')}`,
         isFallback: true,
       };
     }
@@ -142,7 +142,7 @@ export class PrePlantingAuthorizationClient {
    * [2026-02-28] 修复：与省区域同样的三个问题
    * 1. 传 treeCount=0（预种阶段不计入市公司月度考核，等合成1棵树后再累计）
    * 2. 正确解析 { distributions: [...] } 返回格式
-   * 3. fallback 路径添加 padStart(6,'0')，确保生成 7 位标准格式（如 8440100 而非 84401）
+   * 3. fallback 路径使用 padEnd(6,'0') 右补零，确保生成 7 位标准格式（如 8440100）
    */
   async getCityAreaDistribution(
     cityCode: string,
@@ -176,7 +176,7 @@ export class PrePlantingAuthorizationClient {
         `Failed to get city area distribution for ${cityCode}, fallback to system city account`,
       );
       return {
-        recipientAccountSequence: `8${cityCode.padStart(6, '0')}`,
+        recipientAccountSequence: `8${cityCode.padEnd(6, '0')}`,
         isFallback: true,
       };
     }