diff --git a/plugin/webman/gateway/Events.php b/plugin/webman/gateway/Events.php
index 29b194f..3f43f2f 100644
--- a/plugin/webman/gateway/Events.php
+++ b/plugin/webman/gateway/Events.php
@@ -258,6 +258,23 @@ class Events
                 ->order('cons.stock_number', 'asc')
                 ->select()->toArray();
             if(!empty($tb_prod_cons[0])) {
+                // 如果是编辑，拿到已有数量
+                if($message['operate_type'] == 'edit' && !empty($message['id'])) {
+                    $data = Db::query("
+                            SELECT * FROM `tb_cashier_cart` WHERE
+                            `id`={$message['id']}");
+
+                    if($data) {
+                        // 如果编辑数量 小于已有数量并且大于库存数量 直接改成库存数量
+                        if($tb_prod_cons[0]['current_quantity'] < $data[0]['number']) {
+                            $message['number'] = $tb_prod_cons[0]['current_quantity'];
+                        }
+                        if($tb_prod_cons[0]['current_quantity'] <= 0) {
+                            $message['number'] = 0;
+                        }
+                    }
+                }
+
                 if ($tb_prod_cons[0]['quantity'] > $tb_prod_cons[0]['current_quantity']) {
                     $snd_data = [
                         'msg' => '此商品库存不足',