diff --git a/backend/app/Platform/AbstractProductParse.php b/backend/app/Platform/AbstractProductParse.php
index 866adb3..6203a9e 100644
--- a/backend/app/Platform/AbstractProductParse.php
+++ b/backend/app/Platform/AbstractProductParse.php
@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace App\Platform;
 
 use App\Entity\Parse\EntityParse;
-use InvalidArgumentException;
 
 /**
  * 产品解析器抽象基类
@@ -15,5 +14,8 @@ use InvalidArgumentException;
  */
 abstract class AbstractProductParse extends EntityParse implements ProductContract
 {
-  
+    /**
+     * 获取产品状态 ID（抽象方法，由子类实现）
+     */
+    abstract public function getProductStatusId(string $platform_status): int;
 }
\ No newline at end of file
diff --git a/backend/app/Platform/AbstractRefundParse.php b/backend/app/Platform/AbstractRefundParse.php
new file mode 100644
index 0000000..ee108cc
--- /dev/null
+++ b/backend/app/Platform/AbstractRefundParse.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Platform;
+
+use App\Entity\Parse\EntityParse;
+
+/**
+ * 退款解析器抽象基类
+ *
+ * 继承 EntityParse 的通用能力，并实现 RefundContract 契约
+ * 提供退款解析的通用方法和辅助函数
+ */
+abstract class AbstractRefundParse extends EntityParse implements RefundContract
+{
+    /**
+     * 获取退款状态 ID（抽象方法，由子类实现）
+     */
+    abstract public function getRefundStatusId(string $platform_status): int;
+
+    /**
+     * 获取退款类型 ID（抽象方法，由子类实现）
+     */
+    abstract public function getRefundTypeId(array $record): int;
+
+    /**
+     * 是否有父退款（抽象方法，由子类实现）
+     */
+    abstract public function hasParentRefund(): bool;
+
+    /**
+     * 从原始数据格式化退款子项（抽象方法，由子类实现）
+     */
+    abstract public function formatRefundItemsFromRaw(array $raw_data, ?array $platform_refund_id_to_local_refund_id_map): array;
+
+    /**
+     * 通用辅助方法：格式化货币金额
+     *
+     * @param float|int|string|null $amount 金额
+     * @param int $decimals 小数位数，默认 2 位
+     * @return float 格式化后的金额
+     */
+    protected function formatAmount(float|int|string|null $amount, int $decimals = 2): float
+    {
+        return round((float)($amount ?? 0), $decimals);
+    }
+}
diff --git a/backend/app/Platform/ProductConsumer.php b/backend/app/Platform/ProductConsumer.php
index dcaea86..5e100ae 100644
--- a/backend/app/Platform/ProductConsumer.php
+++ b/backend/app/Platform/ProductConsumer.php
@@ -98,11 +98,6 @@ class ProductConsumer extends ConsumerMessage
 
             dump("Processing " . count($data_to_upsert) . " product(s) with batch upsert");
 
-            // 检测产品解析器是否实现了 getProductStatusId 方法
-            if (!method_exists($parse, 'getProductStatusId')) {
-                throw new \Exception('getProductStatusId method must be implemented in ' . $parse::class);
-            }
-
             Db::beginTransaction();
 
             // 使用 upsert 批量处理产品插入和更新
diff --git a/backend/app/Platform/ProductContract.php b/backend/app/Platform/ProductContract.php
index 165f4d5..3f425bf 100644
--- a/backend/app/Platform/ProductContract.php
+++ b/backend/app/Platform/ProductContract.php
@@ -12,5 +12,13 @@ namespace App\Platform;
  */
 interface ProductContract
 {
-
+    /**
+     * 获取产品状态 ID
+     *
+     * 将平台产品状态映射到本地 ProductStatus 枚举
+     *
+     * @param string $platform_status 平台状态字符串
+     * @return int 本地产品状态 ID
+     */
+    public function getProductStatusId(string $platform_status): int;
 }
diff --git a/backend/app/Platform/RefundConsumer.php b/backend/app/Platform/RefundConsumer.php
index dc8628b..635eb57 100644
--- a/backend/app/Platform/RefundConsumer.php
+++ b/backend/app/Platform/RefundConsumer.php
@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace App\Platform;
 
 use App\Entity\Parse\EntityParseFactory;
-use App\Entity\Parse\EntityParseInterface;
 use App\Utils\Log;
 use Hyperf\Amqp\Annotation\Consumer;
 use Hyperf\Amqp\Builder\QueueBuilder;
@@ -15,7 +14,6 @@ use Hyperf\Amqp\Producer;
 use PhpAmqpLib\Message\AMQPMessage;
 use Hyperf\DbConnection\Db;
 use App\Model\RefundItem;
-use Exception;
 use Hyperf\Context\ApplicationContext;
 use Throwable;
 
@@ -71,8 +69,6 @@ class RefundConsumer extends ConsumerMessage
         try {
             $parse = EntityParseFactory::createFromMessage($message);
 
-            $this->parseValidate($parse);
-
             $meta = $data['meta'] ?? [];
             $metadata = [
                 'company_id' => $meta['company_id'] ?? null,
@@ -299,22 +295,4 @@ class RefundConsumer extends ConsumerMessage
         dump("Refund items processing completed");
     }
 
-    protected function parseValidate(EntityParseInterface $parse): void
-    {
-        if (!method_exists($parse, 'hasParentRefund')) {
-            throw new Exception('hasParentRefund method must be implemented in ' . $parse::class);
-        }
-
-        if (!method_exists($parse, 'formatRefundItemsFromRaw')) {
-            throw new Exception('formatRefundItemsFromRaw method must be implemented in ' . $parse::class);
-        }
-
-        if (!method_exists($parse, 'getRefundStatusId')) {
-            throw new Exception('getRefundStatusId method must be implemented in ' . $parse::class);
-        }
-
-        if (!method_exists($parse, 'getRefundTypeId')) {
-            throw new Exception('getRefundTypeId method must be implemented in ' . $parse::class);
-        }
-    }
 }
diff --git a/backend/app/Platform/RefundContract.php b/backend/app/Platform/RefundContract.php
new file mode 100644
index 0000000..ac5602e
--- /dev/null
+++ b/backend/app/Platform/RefundContract.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Platform;
+
+/**
+ * 退款解析器契约接口
+ *
+ * 定义所有电商平台退款解析器必须实现的方法
+ * 适用于：Shopee、Tmall、JD 等所有电商平台
+ */
+interface RefundContract
+{
+    /**
+     * 获取退款状态 ID
+     *
+     * 将平台退款状态映射到本地 RefundStatus 枚举
+     *
+     * @param string $platform_status 平台退款状态字符串
+     * @return int 本地退款状态 ID
+     */
+    public function getRefundStatusId(string $platform_status): int;
+
+    /**
+     * 获取退款类型 ID
+     *
+     * 根据退款记录判断退款类型（退货退款、仅退款等）
+     *
+     * @param array $record 单条退款原始数据
+     * @return int 本地退款类型 ID
+     */
+    public function getRefundTypeId(array $record): int;
+
+    /**
+     * 是否有父退款
+     *
+     * 判断平台是否具有父子退款结构
+     * Shopee 有父退款（return 包含多个 item），Tmall 没有
+     *
+     * @return bool
+     */
+    public function hasParentRefund(): bool;
+
+    /**
+     * 从原始数据格式化退款子项
+     *
+     * @param array $raw_data 原始数据数组
+     * @param array|null $platform_refund_id_to_local_refund_id_map 平台退款 ID => 本地数据库退款 ID 映射
+     * @return array 解析后的退款子项数据数组
+     */
+    public function formatRefundItemsFromRaw(array $raw_data, ?array $platform_refund_id_to_local_refund_id_map): array;
+}
diff --git a/backend/app/Platform/Shopee/EntityParse/Refund.php b/backend/app/Platform/Shopee/EntityParse/Refund.php
index 46536e3..3244afe 100644
--- a/backend/app/Platform/Shopee/EntityParse/Refund.php
+++ b/backend/app/Platform/Shopee/EntityParse/Refund.php
@@ -10,7 +10,7 @@ use App\Platform\Shopee\Constants\ReturnStatus as ShopeeReturnStatus;
 use App\Model\Company;
 use App\Model\Order;
 use App\Model\Store;
-use App\Entity\Parse\EntityParse;
+use App\Platform\AbstractRefundParse;
 use Carbon\Carbon;
 use Hyperf\Collection\LazyCollection;
 use InvalidArgumentException;
@@ -21,7 +21,7 @@ use InvalidArgumentException;
  * Shopee 具有完整的父子退款结构：一个 return 包含多个 item。
  * 每个 return 同时写入 refunds（主记录）和 refund_items（明细）两张表。
  */
-class Refund extends EntityParse
+class Refund extends AbstractRefundParse
 {
     /**
      * 缓存 entityMap 中查询到的订单日期映射，供 formatRefundItemsFromRaw 复用
@@ -178,7 +178,7 @@ class Refund extends EntityParse
      * @param array $platform_refund_id_to_local_refund_id_map [platform_refund_id => local db refund id]
      * @return array
      */
-    public function formatRefundItemsFromRaw(array $raw_data, array $platform_refund_id_to_local_refund_id_map): array
+    public function formatRefundItemsFromRaw(array $raw_data, ?array $platform_refund_id_to_local_refund_id_map): array
     {
         $records = isset($raw_data[0]) ? $raw_data : [$raw_data];
         $items = [];
diff --git a/backend/app/Platform/Tmall/EntityParse/Product.php b/backend/app/Platform/Tmall/EntityParse/Product.php
index 0d7c467..b261b7c 100644
--- a/backend/app/Platform/Tmall/EntityParse/Product.php
+++ b/backend/app/Platform/Tmall/EntityParse/Product.php
@@ -7,7 +7,7 @@ namespace App\Platform\Tmall\EntityParse;
 use App\Constants\ProductStatus;
 use App\Model\Company;
 use App\Model\Store;
-use App\Entity\Parse\EntityParse;
+use App\Platform\AbstractProductParse;
 use App\Platform\Tmall\Constants\ItemStatus;
 use Carbon\Carbon;
 use Hyperf\Collection\LazyCollection;
@@ -18,7 +18,7 @@ use InvalidArgumentException;
  *
  * 将 Tmall 产品原始数据解析为本地 Product 模型格式
  */
-class Product extends EntityParse
+class Product extends AbstractProductParse
 {
     /**
      * 公司作用域匹配
diff --git a/backend/app/Platform/Tmall/EntityParse/Refund.php b/backend/app/Platform/Tmall/EntityParse/Refund.php
index cd0c034..20d15c7 100644
--- a/backend/app/Platform/Tmall/EntityParse/Refund.php
+++ b/backend/app/Platform/Tmall/EntityParse/Refund.php
@@ -15,7 +15,7 @@ use App\Model\Order;
 use App\Model\OrderItem;
 use App\Model\RefundItem;
 use App\Model\Store;
-use App\Entity\Parse\EntityParse;
+use App\Platform\AbstractRefundParse;
 use Carbon\Carbon;
 use Hyperf\Collection\LazyCollection;
 use Hyperf\DbConnection\Db;
@@ -27,7 +27,7 @@ use InvalidArgumentException;
  * Tmall 没有主退款和子退款的概念，每个售后单对应一个订单子项。
  * 每个售后单同时写入 refunds（主记录）和 refund_items（明细）两张表。
  */
-class Refund extends EntityParse
+class Refund extends AbstractRefundParse
 {
     /**
      * 公司作用域匹配
@@ -140,7 +140,7 @@ class Refund extends EntityParse
      * @param array $platform_refund_id_to_local_refund_id_map [platform_refund_id => local db refund id]
      * @return array
      */
-    public function formatRefundItemsFromRaw(array $raw_data, array| null $platform_refund_id_to_local_refund_id_map = null): array
+    public function formatRefundItemsFromRaw(array $raw_data, ?array $platform_refund_id_to_local_refund_id_map): array
     {
         $records = isset($raw_data[0]) ? $raw_data : [$raw_data];
         $items = [];