diff --git a/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs b/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
index db1051bc7..4b7165e10 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/EntityMaintenance/EntityMaintenance.cs
@@ -152,6 +152,7 @@ namespace SqlSugar
                 column.EntityName = result.EntityName;
                 column.PropertyName = property.Name;
                 column.PropertyInfo = property;
+                column.UnderType = UtilMethods.GetUnderType(column.PropertyInfo.PropertyType);
                 if (sugarColumn.IsNullOrEmpty())
                 {
                     column.DbColumnName = property.Name;
diff --git a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
index 0f7e0e68a..17199dc73 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
@@ -6,11 +6,12 @@ using System.Threading.Tasks;
 using System.Linq;
 namespace SqlSugar 
 {
-    public class FastestProvider<T>:IFastest<T> where T:class,new()
+    public partial class FastestProvider<T>:IFastest<T> where T:class,new()
     {
         private SqlSugarProvider context;
         private ISugarQueryable<T> queryable;
         private string AsName { get; set; }
+        private int Size { get; set; }
         private EntityInfo entityInfo { get; set; }
         public FastestProvider(SqlSugarProvider sqlSugarProvider)
         {
@@ -26,11 +27,19 @@ namespace SqlSugar
         }
         public async Task<int> BulkCopyAsync(List<T> datas)
         {
-            DataTable dt = ToDdateTable(datas);
-            IFastBuilder buider = new SqlServerFastBuilder();
-            buider.Context = context;
-            var result = await buider.ExecuteBulkCopyAsync(dt);
-            return result;
+            if (Size > 0)
+            {
+                int resul=0;
+                 await this.context.Utilities.PageEachAsync(datas, Size, async item =>
+                {
+                    resul+= await _BulkCopy(item);
+                });
+                return resul;
+            }
+            else
+            {
+                return await _BulkCopy(datas);
+            }
         }
         #endregion
 
@@ -50,6 +59,26 @@ namespace SqlSugar
             return BulkUpdateAsync(datas,whereColumns,updateColumns).ConfigureAwait(true).GetAwaiter().GetResult();
         }
         public async Task<int> BulkUpdateAsync(List<T> datas,string [] whereColumns,string [] updateColumns)
+        {
+
+            if (Size > 0)
+            {
+                int resul = 0;
+                await this.context.Utilities.PageEachAsync(datas, Size, async item =>
+                {
+                    resul += await _BulkUpdate(item, whereColumns, updateColumns);
+                });
+                return resul;
+            }
+            else
+            {
+                return  await _BulkUpdate(datas, whereColumns, updateColumns);
+            }
+        }
+        #endregion
+
+        #region Core
+        private async Task<int> _BulkUpdate(List<T> datas, string[] whereColumns, string[] updateColumns)
         {
             var isAuto = this.context.CurrentConnectionConfig.IsAutoCloseConnection;
             this.context.CurrentConnectionConfig.IsAutoCloseConnection = false;
@@ -64,107 +93,15 @@ namespace SqlSugar
             this.context.CurrentConnectionConfig.IsAutoCloseConnection = isAuto;
             return result;
         }
-        #endregion
-
-        #region Setting
-        public IFastest<T> AS(string tableName)
+        private async Task<int> _BulkCopy(List<T> datas)
         {
-            this.AsName = tableName;
-            return this;
+            DataTable dt = ToDdateTable(datas);
+            IFastBuilder buider = new SqlServerFastBuilder();
+            buider.Context = context;
+            var result = await buider.ExecuteBulkCopyAsync(dt);
+            return result;
         }
         #endregion
 
-        #region Helper
-        private SqlServerFastBuilder GetBuider()
-        {
-            switch (this.context.CurrentConnectionConfig.DbType)
-            {
-                case DbType.MySql:
-                    break;
-                case DbType.SqlServer:
-                    return new SqlServerFastBuilder();
-                case DbType.Sqlite:
-                    break;
-                case DbType.Oracle:
-                    break;
-                case DbType.PostgreSQL:
-                    break;
-                case DbType.Dm:
-                    break;
-                case DbType.Kdbndp:
-                    break;
-                case DbType.Oscar:
-                    break;
-                default:
-                    break;
-            }
-            throw new Exception(this.context.CurrentConnectionConfig.DbType + "开发中");
-        }
-        private DataTable ToDdateTable(List<T> datas)
-        {
-            DataTable tempDataTable = ReflectionInoCore<DataTable>.GetInstance().GetOrCreate("BulkCopyAsync" + typeof(T).FullName, 
-            () =>
-               {
-                   if (AsName == null)
-                   {
-                       return queryable.Where(it => false).ToDataTable();
-                   }
-                   else
-                   {
-                       return queryable.AS(AsName).Where(it => false).ToDataTable();
-                   }
-               }
-            );
-            var dt = new DataTable();
-            foreach (DataColumn item in tempDataTable.Columns)
-            {
-                dt.Columns.Add(item.ColumnName, item.DataType);
-            }
-            dt.TableName = GetTableName();
-            var columns = entityInfo.Columns;
-            foreach (var item in datas)
-            {
-                var dr = dt.NewRow();
-                foreach (var column in columns)
-                {
-                    if (column.IsIgnore || column.IsOnlyIgnoreInsert)
-                    {
-                        continue;
-                    }
-                    var name = column.DbColumnName;
-                    if (name == null)
-                    {
-                        name = column.PropertyName;
-                    }
-                    var value = ValueConverter(column, PropertyCallAdapterProvider<T>.GetInstance(column.PropertyName).InvokeGet(item));
-                    dr[name] = value;
-                }
-                dt.Rows.Add(dr);
-            }
-
-            return dt;
-        }
-        private string GetTableName()
-        {
-            if (this.AsName.HasValue())
-            {
-                return queryable.SqlBuilder.GetTranslationTableName(AsName);
-            }
-            else
-            {
-                return queryable.SqlBuilder.GetTranslationTableName(entityInfo.DbTableName);
-            }
-        }
-        private object ValueConverter(EntityColumnInfo columnInfo, object value)
-        {
-            if (value == null)
-                return value;
-            if (value is DateTime && (DateTime)value == DateTime.MinValue)
-            {
-                value = Convert.ToDateTime("1900-01-01");
-            }
-            return value;
-        } 
-        #endregion
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Private.cs b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Private.cs
new file mode 100644
index 000000000..289bde247
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Private.cs
@@ -0,0 +1,103 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public partial class FastestProvider<T> : IFastest<T> where T : class, new()
+    {
+        private SqlServerFastBuilder GetBuider()
+        {
+            switch (this.context.CurrentConnectionConfig.DbType)
+            {
+                case DbType.MySql:
+                    break;
+                case DbType.SqlServer:
+                    return new SqlServerFastBuilder();
+                case DbType.Sqlite:
+                    break;
+                case DbType.Oracle:
+                    break;
+                case DbType.PostgreSQL:
+                    break;
+                case DbType.Dm:
+                    break;
+                case DbType.Kdbndp:
+                    break;
+                case DbType.Oscar:
+                    break;
+                default:
+                    break;
+            }
+            throw new Exception(this.context.CurrentConnectionConfig.DbType + "开发中");
+        }
+        private DataTable ToDdateTable(List<T> datas)
+        {
+            DataTable tempDataTable = ReflectionInoCore<DataTable>.GetInstance().GetOrCreate("BulkCopyAsync" + typeof(T).FullName,
+            () =>
+            {
+                if (AsName == null)
+                {
+                    return queryable.Where(it => false).ToDataTable();
+                }
+                else
+                {
+                    return queryable.AS(AsName).Where(it => false).ToDataTable();
+                }
+            }
+            );
+            var dt = new DataTable();
+            foreach (DataColumn item in tempDataTable.Columns)
+            {
+                dt.Columns.Add(item.ColumnName, item.DataType);
+            }
+            dt.TableName = GetTableName();
+            var columns = entityInfo.Columns;
+            foreach (var item in datas)
+            {
+                var dr = dt.NewRow();
+                foreach (var column in columns)
+                {
+                    if (column.IsIgnore || column.IsOnlyIgnoreInsert)
+                    {
+                        continue;
+                    }
+                    var name = column.DbColumnName;
+                    if (name == null)
+                    {
+                        name = column.PropertyName;
+                    }
+                    var value = ValueConverter(column, PropertyCallAdapterProvider<T>.GetInstance(column.PropertyName).InvokeGet(item));
+                    dr[name] = value;
+                }
+                dt.Rows.Add(dr);
+            }
+
+            return dt;
+        }
+        private string GetTableName()
+        {
+            if (this.AsName.HasValue())
+            {
+                return queryable.SqlBuilder.GetTranslationTableName(AsName);
+            }
+            else
+            {
+                return queryable.SqlBuilder.GetTranslationTableName(entityInfo.DbTableName);
+            }
+        }
+        private object ValueConverter(EntityColumnInfo columnInfo, object value)
+        {
+            if (value == null)
+                return value;
+            if (value is DateTime && (DateTime)value == DateTime.MinValue)
+            {
+                value = Convert.ToDateTime("1900-01-01");
+            }
+            return value;
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Setting.cs b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Setting.cs
new file mode 100644
index 000000000..4f14242d0
--- /dev/null
+++ b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/_Setting.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SqlSugar 
+{
+    public partial class FastestProvider<T> : IFastest<T> where T : class, new()
+    {
+        public IFastest<T> AS(string tableName)
+        {
+            this.AsName = tableName;
+            return this;
+        }
+        public IFastest<T> PageSize(int size)
+        {
+            this.Size = size;
+            return this;
+        }
+    }
+}
diff --git a/Src/Asp.Net/SqlSugar/Entities/EntityColumnInfo.cs b/Src/Asp.Net/SqlSugar/Entities/EntityColumnInfo.cs
index 2ef141f4b..6918f5dc7 100644
--- a/Src/Asp.Net/SqlSugar/Entities/EntityColumnInfo.cs
+++ b/Src/Asp.Net/SqlSugar/Entities/EntityColumnInfo.cs
@@ -35,5 +35,6 @@ namespace SqlSugar
         public string[] IndexGroupNameList { get;  set; }
         public string[] UIndexGroupNameList { get;  set; }
         public bool IsArray { get;  set; }
+        public Type UnderType { get;  set; }
     }
 }
diff --git a/Src/Asp.Net/SqlSugar/SqlSugar.csproj b/Src/Asp.Net/SqlSugar/SqlSugar.csproj
index 2ddfb472d..578ada074 100644
--- a/Src/Asp.Net/SqlSugar/SqlSugar.csproj
+++ b/Src/Asp.Net/SqlSugar/SqlSugar.csproj
@@ -89,6 +89,8 @@
     <Compile Include="Abstract\EntityMaintenance\EntityMaintenance.cs" />
     <Compile Include="Abstract\ExpressionableProvider\Expressionable.cs" />
     <Compile Include="Abstract\FastestProvider\FastestProvider.cs" />
+    <Compile Include="Abstract\FastestProvider\_Private.cs" />
+    <Compile Include="Abstract\FastestProvider\_Setting.cs" />
     <Compile Include="Abstract\FilterProvider\FilterProvider.cs" />
     <Compile Include="Interface\IFastBuilder.cs" />
     <Compile Include="Interface\IFastest.cs" />