diff --git a/WebContent/Accounting/LoanSimulation/LoanBasicInfo.jsp b/WebContent/Accounting/LoanSimulation/LoanBasicInfo.jsp
index 9691390e1..25139beac 100644
--- a/WebContent/Accounting/LoanSimulation/LoanBasicInfo.jsp
+++ b/WebContent/Accounting/LoanSimulation/LoanBasicInfo.jsp
@@ -834,7 +834,7 @@ function getRatioByMoney(e){
 		firstPaymentRatio = Number(getItemValue(0, 0, "FIRST_PAYMENT"))/Number(equipAmt)*100;
 	}
 	var ratio = 100 - Number(firstPaymentRatio);
-	cleanLeaseMoney = equipAmt * (ratio / 100) + Number(allMoney);
+	cleanLeaseMoney = equipAmt - Number(getItemValue(0, 0, "FIRST_PAYMENT")) + Number(allMoney);
 	setItemValue(0, 0, "RENT_RATIO", ((cleanLeaseMoney / equipAmt) * 100).toFixed(6) + "");
 	setItemValue(0, 0, "CLEAN_LEASE_MONEY", cleanLeaseMoney + "");
 	allMoney = eval(allMoney + "+" + equipAmt);