diff --git a/packages/fineui/src/base/single/input/file.js b/packages/fineui/src/base/single/input/file.js
index b89be838f..63278b6e0 100644
--- a/packages/fineui/src/base/single/input/file.js
+++ b/packages/fineui/src/base/single/input/file.js
@@ -242,8 +242,8 @@ const sendFile = (toString => {
                     upload.onloadstart();
                 }
             }
-            const boundary = `AjaxUploadBoundary${new Date().getTime()}`;
             if (handler.file.getAsBinary) {
+                const boundary = `AjaxUploadBoundary${new Date().getTime()}`;
                 xhr.setRequestHeader("Content-Type", `multipart/form-data; boundary=${boundary}`);
                 xhr[xhr.sendAsBinary ? "sendAsBinary" : "send"](multipart(boundary, handler.name, handler.file));
             } else {