diff --git a/src/core.js b/src/core.js
index 8e28ba6..6230683 100644
--- a/src/core.js
+++ b/src/core.js
@@ -126,6 +126,7 @@ luckysheet.create = function (setting) {
     luckysheetConfigsetting.workbookCreateBefore = extendsetting.workbookCreateBefore;
     luckysheetConfigsetting.workbookCreateAfter = extendsetting.workbookCreateAfter;
     luckysheetConfigsetting.remoteFunction = extendsetting.remoteFunction;
+    luckysheetConfigsetting.customFunctions = extendsetting.customFunctions;
 
     luckysheetConfigsetting.fireMousedown = extendsetting.fireMousedown;
     luckysheetConfigsetting.forceCalculation = extendsetting.forceCalculation;
@@ -156,7 +157,7 @@ luckysheet.create = function (setting) {
     initPlugins(extendsetting.plugins , extendsetting.data);
 
     // Store formula information, including internationalization
-    functionlist();
+    functionlist(extendsetting.customFunctions);
 
     let devicePixelRatio = extendsetting.devicePixelRatio;
     if(devicePixelRatio == null){
diff --git a/src/function/functionlist.js b/src/function/functionlist.js
index 15e1a17..59fa32c 100644
--- a/src/function/functionlist.js
+++ b/src/function/functionlist.js
@@ -3,10 +3,10 @@ import Store from '../store/index'
 import locale from '../locale/locale';
 //{"0":"数学","1":"统计","2":"查找","3":"Luckysheet内置","4":"数据挖掘","5":"数据源","6":"日期","7":"过滤器","8":"财务","9":"工程计算","10":"逻辑","11":"运算符","12":"文本","13":"转换工具","14":"数组"}
 
-const functionlist = function(){
+const functionlist = function(customFunctions){
     let _locale = locale();
     // internationalization,get function list
-    let functionListOrigin = _locale.functionlist;
+    let functionListOrigin = [..._locale.functionlist];
 
     // add new property f
     for (let i = 0; i < functionListOrigin.length; i++) {
@@ -14,6 +14,10 @@ const functionlist = function(){
         func.f = functionImplementation[func.n];
     }
 
+    if (customFunctions) {
+        functionListOrigin.push(...customFunctions);
+    }
+
     Store.functionlist = functionListOrigin;
     
     // get n property
@@ -29,4 +33,4 @@ const functionlist = function(){
     Store.luckysheet_function = luckysheet_function;
 }
 
-export default functionlist;
\ No newline at end of file
+export default functionlist;