diff --git a/T_IV_SALESIC/ServicePlugIn/Submit.cs b/T_IV_SALESIC/ServicePlugIn/Submit.cs
index f2ee726..2230628 100644
--- a/T_IV_SALESIC/ServicePlugIn/Submit.cs
+++ b/T_IV_SALESIC/ServicePlugIn/Submit.cs
@@ -174,7 +174,7 @@ namespace GZ_LTHPilot_ORDER.T_IV_SALESIC.ServicePlugIn
             // 销售订单退货金额（本币）
             var saleOrderReturnAmount = saleOrderReturnAmountK3 + saleOrderReturnAmountK3Cloud;
             // 校验销售订单累计开票金额 + 本次开票金额 + 已提交发票金额 <= 销售订单价税合计
-            if (saleOrderAmount - saleOrderReturnAmount < saleOrderINVOICEAMOUNT + amount + submitedAmount)
+            if ((saleOrderAmount - saleOrderReturnAmount < saleOrderINVOICEAMOUNT + amount + submitedAmount) && amount >= 0)
             {
                 return new OperateResult()
                 {