diff --git a/app/api/endpoints/wechat.py b/app/api/endpoints/wechat.py
index 9b519d8..698563a 100644
--- a/app/api/endpoints/wechat.py
+++ b/app/api/endpoints/wechat.py
@@ -325,10 +325,10 @@ async def refund_notify(
         
         # 获取退款信息
         out_trade_no = data.get("out_trade_no")  # 订单号
-        refund_status = data.get("refund_status")
+        status = data.get("status")
         success_time = data.get("success_time")
         
-        if not all([out_trade_no, refund_status]) or refund_status != "SUCCESS":
+        if not all([out_trade_no, status]) or status != "SUCCESS":
             return error_response(code=400, message="缺少必要的退款信息或退款未成功")
         
         # 根据订单类型处理退款
@@ -343,6 +343,8 @@ async def refund_notify(
             
             # 更新订单状态
             order.status = MerchantOrderStatus.REFUNDED
+            order.refund_transaction_id = data.get("transaction_id")
+            order.refund_time = datetime.fromisoformat(success_time.replace('Z', '+00:00'))
             
             # 如果订单有赠送积分，则扣除积分
             if order.gift_points > 0:
diff --git a/app/core/wechat.py b/app/core/wechat.py
index 11c635e..a3f59f4 100644
--- a/app/core/wechat.py
+++ b/app/core/wechat.py
@@ -385,45 +385,55 @@ class WeChatClient:
         Returns:
             dict: 退款结果
         """
-        url_path = "/v3/refund/domestic/refunds"
-        api_url = f"https://api.mch.weixin.qq.com{url_path}"
-        
-        # 构建请求数据
-        body = {
-            "out_trade_no": order_id,      # 原订单号
-            "out_refund_no": order_id,     # 退款单号使用原订单号
-            "reason": reason,
-            "notify_url": f"{settings.API_BASE_URL}/api/wechat/refund/notify",
-            "amount": {
-                "refund": total_amount,     # 退款金额
-                "total": total_amount,      # 原订单金额
-                "currency": "CNY"
-            }
-        }
-        
-        # 生成签名
-        nonce_str = str(uuid.uuid4()).replace('-', '')
-        timestamp = str(int(time.time()))
-        signature = self.sign_message("POST", url_path, body)
-        
-        # 构建认证头
-        headers = {
-            'Content-Type': 'application/json',
-            'Accept': 'application/json',
-            'Authorization': (
-                f'WECHATPAY2-SHA256-RSA2048 '
-                f'mchid="{self.mch_id}",'
-                f'nonce_str="{nonce_str}",'
-                f'timestamp="{timestamp}",'
-                f'serial_no="{self.cert_serial_no}",'
-                f'signature="{signature}"'
-            )
-        }
-        
         try:
+            print(f"开始申请退款: order_id={order_id}, amount={total_amount}")
+            # 生成随机字符串
+            nonce_str = generate_random_string()
+            timestamp = str(int(time.time()))
+            
+            # 构建请求URL
+            url_path = "/v3/refund/domestic/refunds"
+            api_url = f"https://api.mch.weixin.qq.com{url_path}"
+            
+            # 构建请求体
+            body = {
+                "out_trade_no": order_id,  # 商户订单号，二选一
+                "out_refund_no": f"refund_{order_id}",  # 商户退款单号
+                "reason": reason,
+                "notify_url": f"{settings.API_BASE_URL}/api/wechat/refund/notify",
+                "amount": {
+                    "refund": total_amount,  # 退款金额
+                    "total": total_amount,   # 原订单金额
+                    "currency": "CNY"
+                }
+            }
+
+             # 生成签名
+            nonce_str, timestamp, signature = self.sign_message("POST", url_path, body)
+            
+            # 构建认证头
+            headers = {
+                'Content-Type': 'application/json',
+                'Accept': 'application/json',
+                'Authorization': (
+                    f'WECHATPAY2-SHA256-RSA2048 '
+                    f'mchid="{self.mch_id}",'
+                    f'nonce_str="{nonce_str}",'
+                    f'timestamp="{timestamp}",'
+                    f'serial_no="{self.cert_serial_no}",'
+                    f'signature="{signature}"'
+                )
+            }
+            
+            # 打印签名相关信息
+            print(f"签名字符串: {nonce_str}, {timestamp}, {signature}")
+            print(f"Authorization: {headers['Authorization']}")
+            
             async with aiohttp.ClientSession() as session:
                 async with session.post(api_url, json=body, headers=headers) as response:
+                    print(f"退款响应状态码: {response.status}")
                     result = await response.json()
+                    print(f"退款响应内容: {result}")
                     
                     if response.status != 200:
                         raise Exception(f"退款申请失败: {result.get('message')}")
@@ -435,6 +445,7 @@ class WeChatClient:
                     return result
                     
         except Exception as e:
+            print(f"申请退款异常: {str(e)}")
             raise Exception(f"申请退款失败: {str(e)}")
 
     async def send_subscribe_message(