diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/CodeFirst/KdbndpCodeFirst.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/CodeFirst/KdbndpCodeFirst.cs
index 1c96fd564..94da7ffae 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/CodeFirst/KdbndpCodeFirst.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/CodeFirst/KdbndpCodeFirst.cs
@@ -76,6 +76,11 @@ namespace SqlSugar
                 {
                     item.Length = 0;
                 }
+                if (IsSqlServerModel()&&item.DataType == "bytea") 
+                {
+                    item.Length = 0;
+                    item.DataType = "varbinary(max)";
+                }
             }
         }
 
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/DbMaintenance/KdbndpDbMaintenance.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/DbMaintenance/KdbndpDbMaintenance.cs
index 5d21d4cc4..db3e2f20b 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/DbMaintenance/KdbndpDbMaintenance.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/DbMaintenance/KdbndpDbMaintenance.cs
@@ -743,6 +743,11 @@ WHERE tgrelid = '" + tableName + "'::regclass");
                     x.Scale = 0;
                 }
             }
+            if (IsSqlServerModel() && x.DataType == "bytea")
+            {
+                x.Length = 0;
+                x.DataType = "varbinary(max)";
+            }
         }
         private bool IsPgModel()
         {
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpInsertBuilder.cs b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpInsertBuilder.cs
index 887e21e1c..a5145b493 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpInsertBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/Kdbndp/SqlBuilder/KdbndpInsertBuilder.cs
@@ -93,7 +93,12 @@ namespace SqlSugar
                             else if (it.Value is bool&& (IsMySqlModel()|| IsSqlServerModel()))
                             {
                                 return Convert.ToBoolean(it.Value)?"1":"0";
-                            } 
+                            }
+                            else if (it.Value is byte[] bytes)
+                            {
+                                string bytesString = "0x" + BitConverter.ToString(bytes).Replace("-", "");
+                                return bytesString;
+                            }
                             else
                             {
                                 value = it.Value;
diff --git a/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec b/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
index 83d94a647..26ce552f1 100644
--- a/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
+++ b/Src/Asp.NetCore2/SqlSugar/SqlSugarForCore.nuspec
@@ -2,7 +2,7 @@
 <package >
   <metadata>
     <id>SqlSugarCore</id>
-    <version>5.1.4.210</version>
+    <version>5.1.4.211-preview03</version>
     <authors>sunkaixuan</authors>
     <owners>果糖大数据科技</owners>
     <licenseUrl>http://www.apache.org/licenses/LICENSE-2.0.html</licenseUrl>