diff --git a/app/Service/PaymentService.php b/app/Service/PaymentService.php
index e9dd773..0314c91 100644
--- a/app/Service/PaymentService.php
+++ b/app/Service/PaymentService.php
@@ -134,6 +134,9 @@ class PaymentService extends AbstractService
     }
 
     public function createOrder(App $app, array $params, User $user, string $payMethod) {
+        if ($params['amount'] < 10) {
+            throw new BusinessException('金额不能小于10');
+        }
         $expiresIn = $params['expiresIn'] ?? 10 * 60;
         $order = new Order();
         $order->app_id = $app->app_id;
@@ -159,6 +162,9 @@ class PaymentService extends AbstractService
         
         $platformAccount = User::getPlatformAccount();
         $fee = $platformAccount ? floor($order->amount * 0.007) : 0;
+        if ($fee <= 0) {
+            $fee = 1;
+        }
         $orderSplitInfos = [];
         $splitUserIds = array_column($params['splitInfoList'], 'splitUserId');
         $users = User::where('app_id', $app->app_id)->whereIn('user_id', $splitUserIds)->get()->keyBy('user_id');