diff --git a/frontend/lib/dom/comment.ts b/frontend/lib/dom/comment.ts
index 1dd8d4a5..dbc01ce7 100644
--- a/frontend/lib/dom/comment.ts
+++ b/frontend/lib/dom/comment.ts
@@ -6,7 +6,7 @@ import iconInfoOutlineRounded from "iconify/info-outline-rounded";
 import { Comment } from "../types";
 import { getJWT, decodeJWT, logout, fetchGitHubMeta } from "../auth";
 import { apiEndpoint } from "../const";
-import { groupBy, dateTimeFormatter } from "../util";
+import { groupBy, dateTimeFormatter, isReallyMobile } from "../util";
 
 let selectedOffset: HTMLElement | null = null;
 
@@ -123,7 +123,7 @@ export const selectOffsetParagraph = async ({
     selectedOffset = el;
   }
 
-  if (selectedOffset?.dataset.reviewHasComments || forceOpenCommentsPanel) {
+  if ((!isReallyMobile() && selectedOffset?.dataset.reviewHasComments) || forceOpenCommentsPanel) {
     delete selectedOffset.dataset.reviewFocused;
     selectedOffset.dataset.reviewSelected = "true";
     // 只有在点击评论按钮时才会 focus 到评论框，这里 forceOpenCommentsPanel === true 就等价于点击评论按钮
diff --git a/frontend/lib/util.ts b/frontend/lib/util.ts
index 462a5a4e..b9dfd48e 100644
--- a/frontend/lib/util.ts
+++ b/frontend/lib/util.ts
@@ -1,6 +1,6 @@
 export const groupBy = function <K extends string, T>(
   arr: T[],
-  func: (el: T) => K,
+  func: (el: T) => K
 ) {
   return arr.reduce(
     (acc, x) => {
@@ -9,7 +9,7 @@ export const groupBy = function <K extends string, T>(
     },
     {} as {
       [key: string]: T[];
-    },
+    }
   );
 };
 
@@ -17,3 +17,9 @@ export const dateTimeFormatter = new Intl.DateTimeFormat("zh-CN", {
   dateStyle: "short",
   timeStyle: "short",
 });
+
+export function isReallyMobile() {
+  return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+    navigator.userAgent
+  );
+}