diff --git a/payment-base-app/src/main/java/com/base/springcloud/service/imp/BillServiceImp.java b/payment-base-app/src/main/java/com/base/springcloud/service/imp/BillServiceImp.java
index 552f80b..850c2f0 100644
--- a/payment-base-app/src/main/java/com/base/springcloud/service/imp/BillServiceImp.java
+++ b/payment-base-app/src/main/java/com/base/springcloud/service/imp/BillServiceImp.java
@@ -67,7 +67,8 @@ public class BillServiceImp implements BillService {
 		BigDecimal orderAmount = new BigDecimal(0);
 		List<String> billIdList = new ArrayList<>();
 		for (SaleBill bill : billAmountList){
-			if(bill.getPayAmount().compareTo(bill.getTotalAmount()) >= 0)
+			BigDecimal payAmount = Optional.ofNullable(bill.getPayAmount()).orElse(BigDecimal.ZERO);
+			if(payAmount.compareTo(bill.getTotalAmount()) >= 0)
 				continue;
 			billIdList.add(bill.getId());
 			orderAmount = orderAmount.add(bill.getTotalAmount());