diff --git a/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts b/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
index 156f9710..3d5f7d36 100644
--- a/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
+++ b/libs/horizon/src/dom/DOMPropertiesHandler/DOMPropertiesHandler.ts
@@ -1,12 +1,12 @@
 import {
   allDelegatedHorizonEvents,
 } from '../../event/EventCollection';
-import {updateCommonProp} from './UpdateCommonProp';
-import {setStyles} from './StyleHandler';
+import { updateCommonProp } from './UpdateCommonProp';
+import { setStyles } from './StyleHandler';
 import {
   listenNonDelegatedEvent
 } from '../../event/EventBinding';
-import {isEventProp, isNativeElement} from '../validators/ValidateProps';
+import { isEventProp, isNativeElement } from '../validators/ValidateProps';
 
 // 初始化DOM属性
 export function setDomProps(
@@ -31,14 +31,14 @@ export function updateDomProps(
   changeList: Array<any>,
   isNativeTag: boolean,
 ): void {
-  for (let i = 0; i < changeList.length; i ++) {
-    const {propName, propVal} = changeList[i];
+  for (let i = 0; i < changeList.length; i++) {
+    const { propName, propVal } = changeList[i];
 
     updateOneProp(dom, propName, propVal, isNativeTag);
   }
 }
 
-function updateOneProp(dom, propName, propVal, isNativeTag, isInit = false) {
+function updateOneProp(dom, propName, propVal, isNativeTag, isInit?: boolean) {
   if (propName === 'style') {
     setStyles(dom, propVal);
   } else if (propName === 'dangerouslySetInnerHTML') {
@@ -65,8 +65,8 @@ export function compareProps(
   newProps: Object,
 ): Array<any> {
   let updatesForStyle = {};
-  const toBeDeletedProps = [];
-  const toBeUpdatedProps = [];
+  const toBeDeletedProps: Array<any> = [];
+  const toBeUpdatedProps: Array<any> = [];
   const keysOfOldProps = Object.keys(oldProps);
   const keysOfNewProps = Object.keys(newProps);
 
@@ -124,7 +124,7 @@ export function compareProps(
         const oldStyleProps = Object.keys(oldPropValue);
         for (let j = 0; j < oldStyleProps.length; j++) {
           const styleProp = oldStyleProps[j];
-          if (!newPropValue || !newPropValue.hasOwnProperty(styleProp)) {
+          if (!newPropValue || !Object.prototype.hasOwnProperty.call(newPropValue, styleProp)) {
             updatesForStyle[styleProp] = '';
           }
         }
diff --git a/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts b/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
index b74aa6db..35d31e20 100644
--- a/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
+++ b/libs/horizon/src/dom/valueHandler/ValueChangeHandler.ts
@@ -7,7 +7,7 @@ const HANDLER_KEY = '_valueChangeHandler';
 
 // 判断是否是 check 类型
 function isCheckType(dom: HTMLInputElement): boolean {
-  const {type, nodeName} = dom;
+  const { type, nodeName } = dom;
   if (nodeName && nodeName.toLowerCase() === 'input') {
     return type === 'checkbox' || type === 'radio';
   }
@@ -27,7 +27,7 @@ export function watchValueChange(dom) {
     // 获取 value 属性的描述信息，其 value 在其 constructor 的 原型上
     const descriptor = Object.getOwnPropertyDescriptor(dom.constructor.prototype, keyForValue);
 
-    if (dom.hasOwnProperty(keyForValue)) {
+    if (Object.prototype.hasOwnProperty.call(dom, keyForValue)) {
       return;
     }
 
@@ -37,7 +37,7 @@ export function watchValueChange(dom) {
     const setFunc = descriptor.set;
     Object.defineProperty(dom, keyForValue, {
       ...descriptor,
-      set: function(value) {
+      set: function (value) {
         currentVal = String(value);
         setFunc.apply(this, [value]);
       },
diff --git a/tsconfig.json b/tsconfig.json
index 9190d6c3..f3af2c18 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -29,7 +29,8 @@
         "types": [], // 赋值为空数组使@types/node不会起作用
         "lib": ["dom", "esnext", "ES2015", "ES2016", "ES2017", "ES2018", "ES2019", "ES2020"],
         "baseUrl": ".",
-        "rootDir": "./libs"
+        "rootDir": "./libs",
+        "strictNullChecks": true
     },
     "include": [
       "./libs/**/src/**/*.ts",