diff --git a/Src/Asp.Net/MySqlTest/UnitTest/UCodeFirst.cs b/Src/Asp.Net/MySqlTest/UnitTest/UCodeFirst.cs
index 2177c7953..1213f4394 100644
--- a/Src/Asp.Net/MySqlTest/UnitTest/UCodeFirst.cs
+++ b/Src/Asp.Net/MySqlTest/UnitTest/UCodeFirst.cs
@@ -38,11 +38,12 @@ namespace OrmTest
             Db.CodeFirst.InitTables<UnitTest012213>();
             Db.CodeFirst.InitTables<UnitTest3131>();
             Db.CodeFirst.InitTables<UnitDateOfTime2>();
-          
+            Db.CodeFirst.InitTables<UnitDateOfTime222>();
             Db.Insertable(new UnitDateOfTime2() { DateTimeOffset1 = DateTimeOffset.Now }).ExecuteCommand();
             Db.Insertable(new List<UnitDateOfTime2> { new UnitDateOfTime2() { DateTimeOffset1 = DateTimeOffset.Now }, new UnitDateOfTime2() { DateTimeOffset1 = DateTimeOffset.Now } }).ExecuteCommand();
             var list2 = Db.Queryable<UnitDateOfTime2>().ToList();
-            
+            Db.Insertable(new UnitDateOfTime222() { DateTimeOffset1 = null }).ExecuteCommand();
+
         }
 
         public class UnitDateOfTime2
@@ -50,7 +51,11 @@ namespace OrmTest
             [SqlSugar.SugarColumn(ColumnDataType ="datetime(3)")]
             public DateTimeOffset DateTimeOffset1 { get; set; }
         }
-
+        public class UnitDateOfTime222
+        {
+            [SqlSugar.SugarColumn(ColumnDataType = "datetime(3)",IsNullable =true)]
+            public DateTimeOffset? DateTimeOffset1 { get; set; }
+        }
         public class UnitTest3131 
         {
             public sbyte Id { get; set; }
diff --git a/Src/Asp.Net/SqlSugar/Realization/MySql/MySqlProvider.cs b/Src/Asp.Net/SqlSugar/Realization/MySql/MySqlProvider.cs
index 3545299cf..4ce4d9220 100644
--- a/Src/Asp.Net/SqlSugar/Realization/MySql/MySqlProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/MySql/MySqlProvider.cs
@@ -119,7 +119,8 @@ namespace SqlSugar
                 }
                 else if (parameter.DbType== System.Data.DbType.DateTimeOffset) 
                 {
-                    sqlParameter.Value = UtilMethods.ConvertFromDateTimeOffset((DateTimeOffset)sqlParameter.Value);
+                    if(sqlParameter.Value != DBNull.Value)
+                       sqlParameter.Value = UtilMethods.ConvertFromDateTimeOffset((DateTimeOffset)sqlParameter.Value);
                     sqlParameter.DbType = System.Data.DbType.DateTime;
                 }
                 ++index;