diff --git a/Plugson/www/plugson_conf_replace.html b/Plugson/www/plugson_conf_replace.html
index 2e97523b..34f9d0b6 100644
--- a/Plugson/www/plugson_conf_replace.html
+++ b/Plugson/www/plugson_conf_replace.html
@@ -214,6 +214,11 @@
   });
 
   $("#id_conf_replace_tbl").on('click', '.ConfReplaceAddBtn', function() {
+    if (m_data_conf_replace[current_tab_index].length >= 2) {
+        Message.error(g_vtoy_cur_language.STR_CONF_REPLACE_MAX_ENTRY);
+        return;
+    }
+
     if (g_current_language === 'en') {
         $('#ConfReplaceForm #ConfReplaceForm_lang_1').text("ISO Path");
         $('#ConfReplaceForm #ConfReplaceForm_lang_2').text(" OK");
diff --git a/Plugson/www/static/js/vtoy.js b/Plugson/www/static/js/vtoy.js
index 5ff968b6..4c1f45bd 100644
--- a/Plugson/www/static/js/vtoy.js
+++ b/Plugson/www/static/js/vtoy.js
@@ -397,6 +397,7 @@ var g_vtoy_cur_language_en =
     "STR_INVALID_NUMBER": "Please input valid non-negative integer!",
     "STR_INVALID_AUTOSEL": "autosel exceeds the length of the list!",
     "STR_INVALID_TIMEOUT": "Please input valid timeout integer!",
+    "STR_CONF_REPLACE_MAX_ENTRY": "At most 2 entries are allowed for each mode, please delete an existing entry first!",
     "STR_INVALID_PERCENT": "Please input integer between 0-100 !",
     "STR_INVALID_COLOR": "Please input valid color!",
     "STR_SELECT": "Please Select",
@@ -539,6 +540,7 @@ var g_vtoy_cur_language_cn =
     "STR_INVALID_NUMBER": "请输入合法的非负整数！",
     "STR_INVALID_AUTOSEL": "autosel 的值超过了列表实际长度！",
     "STR_INVALID_TIMEOUT": "请输入合法的超时秒数！",
+    "STR_CONF_REPLACE_MAX_ENTRY": "每种模式最多只能添加2条记录，请先删除已有的记录！",
     "STR_INVALID_PERCENT": "请输入 0-100 以内的整数！",
     "STR_INVALID_COLOR": "请输入合法的颜色！",
     "STR_SELECT": "请选择",