diff --git a/ui/src/views/knowledge-workflow/index.vue b/ui/src/views/knowledge-workflow/index.vue
index 139c9d6d1..4f7ba2632 100644
--- a/ui/src/views/knowledge-workflow/index.vue
+++ b/ui/src/views/knowledge-workflow/index.vue
@@ -63,6 +63,7 @@
               <el-upload
                 class="import-button"
                 ref="elUploadRef"
+                accept=".kbwf"
                 :file-list="[]"
                 action="#"
                 multiple