diff --git a/src/Luban.Job.Cfg/Source/GenArgs.cs b/src/Luban.Job.Cfg/Source/GenArgs.cs
index 8d8baaf..0295164 100644
--- a/src/Luban.Job.Cfg/Source/GenArgs.cs
+++ b/src/Luban.Job.Cfg/Source/GenArgs.cs
@@ -27,6 +27,9 @@ namespace Luban.Job.Cfg
         [Option("template_name", Required = false, HelpText = "template name. use with gen_types=data_template")]
         public string TemplateName { get; set; }
 
+        [Option("data_file_extension", Required = false, HelpText = "data file name extension. default choose by gen_type")]
+        public string DataFileExtension { get; set; }
+
         [Option('s', "service", Required = true, HelpText = "service")]
         public string Service { get; set; }
 
diff --git a/src/Luban.Job.Cfg/Source/Generate/DataScatterRender.cs b/src/Luban.Job.Cfg/Source/Generate/DataScatterRender.cs
index d684450..238c822 100644
--- a/src/Luban.Job.Cfg/Source/Generate/DataScatterRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/DataScatterRender.cs
@@ -26,7 +26,7 @@ namespace Luban.Job.Cfg.Generate
             {
                 ctx.Tasks.Add(Task.Run(() =>
                 {
-                    var file = RenderFileUtil.GetOutputFileName(genType, table.OutputDataFile);
+                    var file = RenderFileUtil.GetOutputFileName(genType, table.OutputDataFile, ctx.GenArgs.DataFileExtension);
                     var records = ctx.Assembly.GetTableExportDataList(table);
                     if (!FileRecordCacheManager.Ins.TryGetRecordOutputData(table, records, genType, out string md5))
                     {
diff --git a/src/Luban.Job.Cfg/Source/Generate/TemplateDataScatterRender.cs b/src/Luban.Job.Cfg/Source/Generate/TemplateDataScatterRender.cs
index f4ed52b..e9e452d 100644
--- a/src/Luban.Job.Cfg/Source/Generate/TemplateDataScatterRender.cs
+++ b/src/Luban.Job.Cfg/Source/Generate/TemplateDataScatterRender.cs
@@ -20,7 +20,7 @@ namespace Luban.Job.Cfg.Generate
             {
                 ctx.Tasks.Add(Task.Run(() =>
                 {
-                    var file = RenderFileUtil.GetOutputFileName(genType, table.OutputDataFile);
+                    var file = RenderFileUtil.GetOutputFileName(genType, table.OutputDataFile, ctx.GenArgs.DataFileExtension);
                     var records = ctx.Assembly.GetTableExportDataList(table);
                     if (!FileRecordCacheManager.Ins.TryGetRecordOutputData(table, records, genType, out string md5))
                     {
diff --git a/src/Luban.Job.Common/Source/Utils/RenderFileUtil.cs b/src/Luban.Job.Common/Source/Utils/RenderFileUtil.cs
index 9d0b180..ef0d84b 100644
--- a/src/Luban.Job.Common/Source/Utils/RenderFileUtil.cs
+++ b/src/Luban.Job.Common/Source/Utils/RenderFileUtil.cs
@@ -135,9 +135,9 @@ namespace Luban.Job.Common.Utils
             throw new Exception($"not support output data type:{genType}");
         }
 
-        public static string GetOutputFileName(string genType, string fileName)
+        public static string GetOutputFileName(string genType, string fileName, string fileExtension)
         {
-            return $"{fileName}.{GetOutputFileSuffix(genType)}";
+            return $"{fileName}.{(string.IsNullOrEmpty(fileExtension) ? GetOutputFileSuffix(genType) : fileExtension)}";
         }
     }
 }