diff --git a/install.sh b/install.sh
index 72c3c94d..bfec102a 100755
--- a/install.sh
+++ b/install.sh
@@ -143,10 +143,14 @@ select_menu() {
 
     local i
     for i in "${!options[@]}"; do
+      local tag="" tag_plain=""
+      if [[ "$i" -eq "${default_index:-99}" ]]; then
+        tag=" ${CC_SUCCESS}[自动]${C_RESET}"; tag_plain=" [自动]"
+      fi
       if [[ "$i" -eq "$selected" ]]; then
-        ctms_box_line "${C_BLUE}${C_BOLD}" "$UI_BOX_WIDTH" "${ICON_BULLET} ${options[$i]}" "${CC_INFO}${C_BOLD}${ICON_BULLET} ${options[$i]}${C_RESET}"
+        ctms_box_line "${C_BLUE}${C_BOLD}" "$UI_BOX_WIDTH" "${ICON_BULLET} ${options[$i]}${tag_plain}" "${CC_INFO}${C_BOLD}${ICON_BULLET} ${options[$i]}${C_RESET}${tag}"
       else
-        ctms_box_line "${C_BLUE}${C_BOLD}" "$UI_BOX_WIDTH" "${ICON_BULLET_OFF} ${options[$i]}" "${CC_MUTED}${ICON_BULLET_OFF} ${options[$i]}${C_RESET}"
+        ctms_box_line "${C_BLUE}${C_BOLD}" "$UI_BOX_WIDTH" "${ICON_BULLET_OFF} ${options[$i]}${tag_plain}" "${CC_MUTED}${ICON_BULLET_OFF} ${options[$i]}${C_RESET}${tag}"
       fi
     done
     ctms_box_bottom "${C_BLUE}${C_BOLD}" "$UI_BOX_WIDTH"