diff --git a/Src/Asp.NetCore2/OracleTest/UnitTest/Main.cs b/Src/Asp.NetCore2/OracleTest/UnitTest/Main.cs
index d9ea156f0..09c5fb8ed 100644
--- a/Src/Asp.NetCore2/OracleTest/UnitTest/Main.cs
+++ b/Src/Asp.NetCore2/OracleTest/UnitTest/Main.cs
@@ -34,6 +34,7 @@ namespace OrmTest
         }
         public static void Init()
         {
+            UnitBulkMerge.Init();
             Unit2121.Init();
             UCustom01.Init();
             Bulk();
diff --git a/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs b/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs
new file mode 100644
index 000000000..56fc27c14
--- /dev/null
+++ b/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace OrmTest
+{
+    internal class UnitBulkMerge
+    {
+        public static void Init() 
+        {
+            var db = NewUnitTest.Db;
+            db.CodeFirst.InitTables<UnitaafdsTest>();
+            db.DbMaintenance.TruncateTable<UnitaafdsTest>();
+            var count=db.Fastest<UnitaafdsTest>()
+                .BulkMerge(new List<UnitaafdsTest>() { new UnitaafdsTest() { Id=Guid.NewGuid()
+                , CreateTime=DateTime.Now, Name="a"} });
+            var list=db.Queryable<UnitaafdsTest>().ToList();
+            list[0].Name = "j";
+            var count2 = db.Fastest<UnitaafdsTest>()
+             .BulkMerge(list);
+            var list2 = db.Queryable<UnitaafdsTest>().ToList();
+            for (int i = 0; i < 1000; i++)
+            {
+                db.Fastest<UnitaafdsTest>()
+         .BulkMerge(list); 
+            }
+        }
+    }
+    public class UnitaafdsTest
+    {
+        [SqlSugar.SugarColumn(IsPrimaryKey = true)]
+        public Guid Id { get; set; }
+        public string Name { get; set; }
+        public DateTime CreateTime{ get; set; }
+    }
+}
diff --git a/Src/Asp.NetCore2/SqlSugar/Abstract/FastestProvider/FastestProvider.cs b/Src/Asp.NetCore2/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
index 81ae2c6cd..08a399fe2 100644
--- a/Src/Asp.NetCore2/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Abstract/FastestProvider/FastestProvider.cs
@@ -216,6 +216,7 @@ namespace SqlSugar
             IFastBuilder buider = GetBuider();
             buider.Context = context;
             await buider.CreateTempAsync<T>(dt);
+            await buider.ExecuteBulkCopyAsync(dt);
             var result = await buider.Merge(dt, this.entityInfo,whereColumns,updateColumns);
             //var queryTemp = this.context.Queryable<T>().AS(dt.TableName).ToList();//test
             //var result = await buider.UpdateByTempAsync(GetTableName(), dt.TableName, updateColumns, whereColumns);