diff --git a/app/src/layout/dock/Files.ts b/app/src/layout/dock/Files.ts
index c6b3f3b72..21b1320a8 100644
--- a/app/src/layout/dock/Files.ts
+++ b/app/src/layout/dock/Files.ts
@@ -921,7 +921,9 @@ export class Files extends Model {
             // 文件展开时，刷新
             liElement.nextElementSibling.remove();
         }
-        liElement.querySelector(".b3-list-item__arrow").classList.add("b3-list-item__arrow--open");
+        const arrowElement = liElement.querySelector(".b3-list-item__arrow")
+        arrowElement.classList.add("b3-list-item__arrow--open");
+        arrowElement.parentElement.classList.remove("fn__hidden");
         liElement.insertAdjacentHTML("afterend", `<ul>${fileHTML}</ul>`);
         this.setCurrent(this.element.querySelector(`ul[data-url="${data.box}"] li[data-path="${filePath}"]`));
     }