diff --git a/backend/modules/goods/models/ars/Category.php b/backend/modules/goods/models/ars/Category.php
index 16bf72f..e32fd7c 100755
--- a/backend/modules/goods/models/ars/Category.php
+++ b/backend/modules/goods/models/ars/Category.php
@@ -112,4 +112,12 @@ class Category extends \yii\db\ActiveRecord
     {
         return $this->hasOne(File::className(), ['id' => 'icon']);
     }
+
+    public function beforeSave($insert)
+    {
+        if (!$this->sort_order) {
+            $this->sort_order = "999";
+        }
+        return parent::beforeSave($insert); // TODO: Change the autogenerated stub
+    }
 }