diff --git a/blueprints/payment.py b/blueprints/payment.py
index ef74597..01d0f75 100644
--- a/blueprints/payment.py
+++ b/blueprints/payment.py
@@ -169,6 +169,7 @@ def payment_notify():
     """支付宝异步通知"""
     try:
         data = request.form.to_dict()
+        system_logger.info(f"Received Alipay Notify: {data}")
         signature = data.get("sign")
         
         if not signature:
diff --git a/services/alipay_service.py b/services/alipay_service.py
index 1bf5e91..dfe730f 100644
--- a/services/alipay_service.py
+++ b/services/alipay_service.py
@@ -52,6 +52,7 @@ class AlipayService:
             # python-alipay-sdk 的 verify 方法会自动处理 sign 的移除
             # 但为了保险，我们手动移除它，保留其他所有字段
             verify_data.pop('sign', None)
+            verify_data.pop('sign_type', None)
             
             alipay = self.get_alipay_client()
             # 对于同步回调，sign_type 实际上是参与签名的（某些版本/接口）