diff --git a/BBWY.Server.Model/Db/PurchaseOrder/PurchaseOrder.cs b/BBWY.Server.Model/Db/PurchaseOrder/PurchaseOrder.cs
index 9352327f..6acfa8f2 100644
--- a/BBWY.Server.Model/Db/PurchaseOrder/PurchaseOrder.cs
+++ b/BBWY.Server.Model/Db/PurchaseOrder/PurchaseOrder.cs
@@ -50,7 +50,7 @@ namespace BBWY.Server.Model.Db
         /// <summary>
         /// 采购单号
         /// </summary>
-        [Column(StringLength = 50, IsNullable = false)]
+        [Column(StringLength = 200, IsNullable = false)]
         public string PurchaseOrderId { get; set; }
 
         /// <summary>