diff --git a/frontend/src/business/components/api/definition/components/ApiVariableAdvance.vue b/frontend/src/business/components/api/definition/components/ApiVariableAdvance.vue
index 7b45e2e06c..213ae0f792 100644
--- a/frontend/src/business/components/api/definition/components/ApiVariableAdvance.vue
+++ b/frontend/src/business/components/api/definition/components/ApiVariableAdvance.vue
@@ -511,6 +511,10 @@
         }
       },
       addFunc() {
+        if(this.itemValue == undefined || this.itemValue == null){
+          this.$warning(this.$t('api_test.request.parameters_advance_add_mock_error'));
+          return;
+        }
         if(this.itemValue.indexOf('@') == -1){
           this.itemValue = '@' + this.itemValue;
         } else {
diff --git a/frontend/src/i18n/en-US.js b/frontend/src/i18n/en-US.js
index c498230ece..85a93cce9c 100644
--- a/frontend/src/i18n/en-US.js
+++ b/frontend/src/i18n/en-US.js
@@ -1456,6 +1456,7 @@ export default {
       parameters_advance_add_func: "Add Function",
       parameters_advance_add_func_limit: "Support up to 5 functions",
       parameters_advance_add_func_error: "Please select function first",
+      parameters_advance_add_mock_error: "Please select mock data first",
       parameters_advance_add_param_error: "Please enter function parameters",
       parameters_desc: "Parameters will be appended to the URL e.g. https://fit2cloud.com?Name=Value&Name2=Value2",
       headers: "Headers",
diff --git a/frontend/src/i18n/zh-CN.js b/frontend/src/i18n/zh-CN.js
index 69ea411fdf..4612ec4b05 100644
--- a/frontend/src/i18n/zh-CN.js
+++ b/frontend/src/i18n/zh-CN.js
@@ -1461,6 +1461,7 @@ export default {
       parameters_advance_add_func: "添加函数",
       parameters_advance_add_func_limit: "最多支持5个函数",
       parameters_advance_add_func_error: "请先选择函数",
+      parameters_advance_add_mock_error: "请先选择mock数据",
       parameters_advance_add_param_error: "请输入函数参数",
       parameters_desc: "参数追加到URL，例如https://fit2cloud.com/entries?key1=Value1&Key2=Value2",
       headers: "请求头",
diff --git a/frontend/src/i18n/zh-TW.js b/frontend/src/i18n/zh-TW.js
index f691f12f59..005b2b43a8 100644
--- a/frontend/src/i18n/zh-TW.js
+++ b/frontend/src/i18n/zh-TW.js
@@ -1461,6 +1461,7 @@ export default {
       parameters_advance_add_func: "添加函數",
       parameters_advance_add_func_limit: "最多支持5個函數",
       parameters_advance_add_func_error: "請先選擇函數",
+      parameters_advance_add_mock_error: "請先選擇mock數據",
       parameters_advance_add_param_error: "請輸入函數參數",
       parameters_desc: "參數追加到URL，例如https://fit2cloud.com/entries?key1=Value1&Key2=Value2",
       headers: "請求頭",