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 b0ab015..552f80b 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
@@ -38,7 +38,8 @@ public class BillServiceImp implements BillService {
 		if(!Optional.ofNullable(queryResult).isPresent()){
 			throw new BusinessException(ErrorConstant.BILL_INVALID);
 		}
-		if(queryResult.getPayAmount().compareTo(queryResult.getTotalAmount()) >= 0)
+		BigDecimal payAmount = Optional.ofNullable(queryResult.getPayAmount()).orElse(BigDecimal.ZERO);
+		if(payAmount.compareTo(queryResult.getTotalAmount()) >= 0)
 			throw new BusinessException(ErrorConstant.BILL_COMPLETE_PAYMENT);
 		orderBO.setAmount(queryResult.getTotalAmount());
 		List<SaleBill> saleBillList = new ArrayList<>();