diff --git a/backend/app/Constants/OrderType.php b/backend/app/Constants/OrderType.php
new file mode 100644
index 0000000..89ca83d
--- /dev/null
+++ b/backend/app/Constants/OrderType.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Constants;
+
+use Hyperf\Constants\Annotation\Constants;
+use Hyperf\Constants\Annotation\Message;
+use Hyperf\Constants\EnumConstantsTrait;
+
+#[Constants]
+enum OrderType: int
+{
+    use EnumConstantsTrait;
+
+    // 普通订单
+    #[Message("Normal Order")]
+    case Normor_Order = 1;
+
+    // 有可能存在其他特殊订单的情况
+    // 比如：
+    // 1. 1 元锁定优惠订单
+    // 2. 不差价无实物订单
+    // 3. 服务类订单
+    // 4. 退运费订单（仅存在售后单，主订单不存在）
+}
diff --git a/backend/app/Model/Order.php b/backend/app/Model/Order.php
index 00a888c..7ab1b35 100644
--- a/backend/app/Model/Order.php
+++ b/backend/app/Model/Order.php
@@ -56,7 +56,7 @@ class Order extends Model
     /**
      * The attributes that should be cast to native types.
      */
-    protected array $casts = ['id' => 'integer', 'company_id' => 'integer', 'platform_id' => 'integer', 'store_id' => 'integer', 'order_status_id' => 'integer', 'payment_method_id' => 'integer', 'presale' => 'boolean', 'order_type_id' => 'integer', 'created_at' => 'datetime', 'updated_at' => 'datetime'];
+    protected array $casts = ['id' => 'integer', 'company_id' => 'integer', 'platform_id' => 'integer', 'store_id' => 'integer', 'order_status_id' => 'integer', 'payment_method_id' => 'integer', 'presale' => 'boolean', 'order_type_id' => 'integer', 'raw' => 'json', 'ext' => 'json', 'created_at' => 'datetime', 'updated_at' => 'datetime'];
 
     /**
      * 获取订单子项（基于 hypertable 分区键查询）