diff --git a/BWP.B3_YunKen/BLActions/OrderFreightData.cs b/BWP.B3_YunKen/BLActions/OrderFreightData.cs
index 4b358db..76d31a2 100644
--- a/BWP.B3_YunKen/BLActions/OrderFreightData.cs
+++ b/BWP.B3_YunKen/BLActions/OrderFreightData.cs
@@ -30,8 +30,12 @@ namespace BWP.B3_YunKen.BLActions
                 return;
             if (bill.FreightPayment == 运费支付方式.计重) {
               bill.FreightPrice = (Money<金额>?)(bill.AllUnitNum * (bill.FreightUnitPrice??0).Value);
-            } else if (bill.FreightPayment == 运费支付方式.包车 && bill.AllUnitNum!=0) {
-              bill.FreightUnitPrice = bill.FreightPrice / bill.AllUnitNum.Value.Value;
+            } else if (bill.FreightPayment == 运费支付方式.包车) {
+              if (bill.AllUnitNum == 0 || bill.AllUnitNum == null)
+                bill.FreightUnitPrice = null;
+              else
+                bill.FreightUnitPrice = bill.FreightPrice / bill.AllUnitNum.Value.Value;
+              
             }
         }