diff --git a/backend/application/common/service/TransferAuthorizationService.php b/backend/application/common/service/TransferAuthorizationService.php
index e061158..d324411 100644
--- a/backend/application/common/service/TransferAuthorizationService.php
+++ b/backend/application/common/service/TransferAuthorizationService.php
@@ -182,19 +182,25 @@ class TransferAuthorizationService
 
     /**
      * 向微信发起授权申请
+     * @param bool $isRetry 是否为换号重试(防止递归)
      */
-    private static function requestAuthorization($user, string $authNo, string $displayName, EasyWeChatService $wechat, bool $renew): array
+    private static function requestAuthorization($user, string $authNo, string $displayName, EasyWeChatService $wechat, bool $renew, bool $isRetry = false): array
     {
         $userId = $user->id;
         $res = $wechat->applyTransferAuthorization($authNo, $user->openid, $displayName);
 
-        //当前单已受理/已终结：改为查单，禁止换号重试
+        //单号已被占用(已受理/已终结/重入参数不一致)：查单按微信侧实际状态处理
         if (self::isApplyConflict($res)) {
             $query = $wechat->queryTransferAuthorization($authNo, false);
             $resolved = self::resolveByWechatState($userId, $authNo, $query, $wechat, self::getByUserId($userId));
             if ($resolved !== null) {
                 return $resolved;
             }
+            //原单已无法拉起授权页：已终结，或重入参数不一致导致该单号不可复用。
+            //换全新单号重新发起，保证用户一定能拿到 package；原未确认单 24 小时后自动关闭
+            if (!$isRetry) {
+                return self::requestAuthorization($user, self::generateAuthNoUnique($userId), $displayName, $wechat, true, true);
+            }
         }
 
         if (self::isQuantityLimit($res)) {
@@ -282,7 +288,11 @@ class TransferAuthorizationService
     {
         $message = (string)($res['message'] ?? '');
 
-        return mb_strpos($message, '已解除或已授权成功') !== false;
+        //单号已被占用：原单已解除/已授权成功，或重复发起时请求参数与原单不一致(重入校验)
+        return $message !== '' && (
+            mb_strpos($message, '已解除或已授权成功') !== false
+            || mb_strpos($message, '重入参数不一致') !== false
+        );
     }
 
     /**