diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/FastestProvider/Private.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/FastestProvider/Private.cs
index c79a70b42..bfdbecf39 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/FastestProvider/Private.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Abstract/FastestProvider/Private.cs
@@ -20,7 +20,7 @@ namespace SqlSugar
                 case DbType.Sqlite:
                     break;
                 case DbType.Oracle:
-                    return new OracleFastBuilder();
+                    return new OracleFastBuilder(this.entityInfo);
                 case DbType.PostgreSQL:
                     return new PostgreSQLFastBuilder(this.entityInfo);
                 case DbType.Dm:
diff --git a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Realization/Oracle/SqlBuilder/OracleFastBuilder.cs b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Realization/Oracle/SqlBuilder/OracleFastBuilder.cs
index e369ab217..505f95a39 100644
--- a/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Realization/Oracle/SqlBuilder/OracleFastBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSeverTest/SqlSugar/Realization/Oracle/SqlBuilder/OracleFastBuilder.cs
@@ -10,6 +10,13 @@ namespace SqlSugar
 {
     public class OracleFastBuilder : FastBuilder, IFastBuilder
     {
+        private EntityInfo entityInfo;
+
+        public OracleFastBuilder(EntityInfo entityInfo)
+        {
+            this.entityInfo = entityInfo;
+        }
+
         public override string UpdateSql { get; set; } = "UPDATE (SELECT A.NAME ANAME,B.NAME BNAME FROM A,B WHERE A.ID=B.ID)SET ANAME = BNAME;";
         public override async Task CreateTempAsync<T>(DataTable dt)
         {
@@ -51,6 +58,11 @@ namespace SqlSugar
         }
         public Task<int> ExecuteBulkCopyAsync(DataTable dt)
         {
+            var identityColumnInfo = this.entityInfo.Columns.FirstOrDefault(it => it.IsIdentity);
+            if (identityColumnInfo != null)
+            {
+                throw new Exception("Oracle bulkcopy no support identity");
+            }
             OracleBulkCopy copy = GetBulkCopyInstance();
             try
             {