diff --git a/Src/Asp.Net/SqlServerTest/BugTest/Bug2.cs b/Src/Asp.Net/SqlServerTest/BugTest/Bug2.cs
index 9874c3521..7fb7a5251 100644
--- a/Src/Asp.Net/SqlServerTest/BugTest/Bug2.cs
+++ b/Src/Asp.Net/SqlServerTest/BugTest/Bug2.cs
@@ -93,7 +93,8 @@ namespace OrmTest.BugTest
                 BrandId = -1,
                 UserLevel = 1
             }).IgnoreColumns(m => new { m.CreditUpdatetime,m.UserId }).ToSql();
-
+            DB.CodeFirst.InitTables(typeof(DataTest));
+            DB.Insertable(new DataTest()).ExecuteCommand();
 
         }
     }
@@ -168,5 +169,10 @@ namespace OrmTest.BugTest
         public DateTime CreditUpdatetime { get; set; }
         #endregion
     }
+
+    public class DataTest {
+        [SugarColumn( ColumnDataType = "time",IsNullable =true)]
+         public TimeSpan? dateTime { get; set; }
+    }
 }
  
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
index f6dbbf4b3..1a8f95e66 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/Common/SugarParameter.cs
@@ -97,7 +97,8 @@ namespace SqlSugar
             }
             else if (type == UtilConstants.TimeSpanType)
             {
-                this.Value = this.Value.ToString();
+                if (this.Value != null)
+                    this.Value = this.Value.ToString();
             }
 
         }