diff --git a/Myshipping.Application/EDI/PILEdiHelper.cs b/Myshipping.Application/EDI/PILEdiHelper.cs
index b7c0a7cc..178c0ff9 100644
--- a/Myshipping.Application/EDI/PILEdiHelper.cs
+++ b/Myshipping.Application/EDI/PILEdiHelper.cs
@@ -453,6 +453,10 @@ namespace Myshipping.Application.EDI.PIL
                 if (bill.CARGOID == null || bill.CARGOID == "")
                 { error = error + "<br />提单号：" + bill.MBLNO + "货物标示不能为空"; }
 
+                //2023-05-19 增加运费协议号必填
+                if (string.IsNullOrWhiteSpace(bill.CONTRACTNO))
+                { error = error + "<br />提单号：" + bill.MBLNO + "运费协议号不能为空"; }
+
                 if (bill.CARGOID == "D")
                 {
                     if (bill.DCLASS == null || bill.DCLASS == "")
@@ -1067,7 +1071,7 @@ namespace Myshipping.Application.EDI.PIL
                 }
                 else
                 {
-                    if (contractno == "")
+                    if (string.IsNullOrWhiteSpace(contractno))
                     {
                         tempstr += GetSpaceStr("DUM000001", 11);//3 //Deciding Party Code//O//X(10)//6 //15 //webcsm Partner Code//mandtory (DUM000001),填RFA;美国线的S/C或者TAA填写在record 74，美国线留空
                     }