diff --git a/app/src/protyle/export/index.ts b/app/src/protyle/export/index.ts
index 38ed69079..9f36405e0 100644
--- a/app/src/protyle/export/index.ts
+++ b/app/src/protyle/export/index.ts
@@ -624,7 +624,6 @@ const onExport = (data: IWebSocketData, filePath: string, exportOption: IExportO
 <body>
 <div class="${["htmlmd", "word"].includes(exportOption.type) ? "b3-typography" : "protyle-wysiwyg" + (window.siyuan.config.editor.displayBookmarkIcon ? " protyle-wysiwyg--attr" : "")}" 
 style="max-width: 800px;margin: 0 auto;" 
-data-doc-type="${exportOption.fileType}" 
 id="preview">${data.data.content}</div>
 <script src="appearance/icons/${window.siyuan.config.appearance.icon}/icon.js?${Constants.SIYUAN_VERSION}"></script>
 <script src="stage/build/export/protyle-method.js?${Constants.SIYUAN_VERSION}"></script>
