diff --git a/src/Services/Payment.php b/src/Services/Payment.php
index 082d7dff8..db4d48c01 100755
--- a/src/Services/Payment.php
+++ b/src/Services/Payment.php
@@ -239,7 +239,7 @@ final class Payment
             ]);
         }
         
-        if ($product->sale_count >= $product->stock) {
+        if ($product->stock > -1 && $product->sale_count >= $product->stock) {
             return $response->withJson([
                 'ret' => 0,
                 'msg' => '商品不存在或库存不足',