diff --git a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PayCloseService.java b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PayCloseService.java
index 0b9c2fbab..b42ae791a 100644
--- a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PayCloseService.java
+++ b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PayCloseService.java
@@ -117,6 +117,8 @@ public class PayCloseService {
                 .setClosed(StrUtil.isBlank(errMsg))
                 .setCloseType(closeType.getCode())
                 .setErrorMsg(errMsg);
+        // 商户号显式赋值, 不依赖线程上下文自动填充(异步通知/定时任务等非HTTP场景上下文缺失会导致填充null)
+        record.setMchNo(trade.getMchNo());
         payCloseRecordService.saveRecord(record);
     }
 }
diff --git a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PaySyncService.java b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PaySyncService.java
index 89f4bfe73..75b163a37 100644
--- a/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PaySyncService.java
+++ b/daxpay-payment/daxpay-payment-common/src/main/java/cn/daxpay/open/payment/core/trade/service/PaySyncService.java
@@ -214,6 +214,8 @@ public class PaySyncService {
                 .setAdjust(adjust)
                 .setErrorCode(syncResult.getSyncErrorCode())
                 .setErrorMsg(syncResult.getSyncErrorMsg());
+        // 商户号显式赋值, 不依赖线程上下文自动填充(异步通知/定时任务等非HTTP场景上下文缺失会导致填充null)
+        record.setMchNo(trade.getMchNo());
         paySyncRecordService.saveRecord(record);
     }
 }