diff --git a/bin/omarchy-cn-install-overlay b/bin/omarchy-cn-install-overlay
index 769ea632..18eb62ec 100755
--- a/bin/omarchy-cn-install-overlay
+++ b/bin/omarchy-cn-install-overlay
@@ -27,8 +27,15 @@ valid_entry() {
 MENU_EXT="$HOME/.config/omarchy/extensions/omarchy-menu.jsonc"
 MENU_MARKER="// OmarchyCN overlay menu extension"
 
+# Comments-only files (upstream ships such a template) hold no user content
+menu_ext_has_user_content() {
+  [[ -f $MENU_EXT ]] || return 1
+  grep -qF "$MENU_MARKER" "$MENU_EXT" && return 1
+  [[ -n $(grep -vE '^[[:space:]]*(//.*)?$' "$MENU_EXT" | tr -d '[:space:]{}') ]]
+}
+
 install_menu_extension() {
-  if [[ -s $MENU_EXT ]] && ! grep -qF "$MENU_MARKER" "$MENU_EXT"; then
+  if menu_ext_has_user_content; then
     echo "跳过菜单扩展：$MENU_EXT 已有用户内容，请手动合并 default/omarchy/omarchy-menu.jsonc 的 OmarchyCN 段"
     return 0
   fi