diff --git a/src/common/utils.ts b/src/common/utils.ts
index 1aee6c9fc..d59855ade 100644
--- a/src/common/utils.ts
+++ b/src/common/utils.ts
@@ -200,14 +200,14 @@ export const getInstance = function (context?: Context, selector?: string) {
   return instance;
 };
 
-export const unitConvert = (value: number | string): number => {
+export const unitConvert = (value: number | string | null | undefined): number => {
   if (typeof value === 'string') {
     if (value.includes('rpx')) {
       return (parseInt(value, 10) * (systemInfo?.screenWidth ?? 750)) / 750;
     }
     return parseInt(value, 10);
   }
-  return value;
+  return value ?? 0;
 };
 
 export const setIcon = (iconName, icon, defaultIcon) => {
diff --git a/src/message/__test__/__snapshots__/index.test.js.snap b/src/message/__test__/__snapshots__/index.test.js.snap
index 46b21c436..932e82255 100644
--- a/src/message/__test__/__snapshots__/index.test.js.snap
+++ b/src/message/__test__/__snapshots__/index.test.js.snap
@@ -15,7 +15,7 @@ exports[`message props : style && customStyle 1`] = `
         ariaRole="alert"
         class="t-message class t-class t-message--warning "
         id="t-message_0"
-        style="z-index:15000;top:20px;right:32rpx;left:32rpx; color: red; font-size: 9px;"
+        style="z-index:15000;top:20px;left:20rpx;right:32rpx; color: red; font-size: 9px;"
       >
         <wx-view
           class="t-message__icon--left"
diff --git a/src/message/message-item/message.wxs b/src/message/message-item/message.wxs
index 7584a42f8..38ecbe1dd 100644
--- a/src/message/message-item/message.wxs
+++ b/src/message/message-item/message.wxs
@@ -9,12 +9,17 @@ var changeNumToStr = function (arr) {
 };
 
 var getMessageStyles = function (zIndex, offset, wrapTop) {
-  var arr = changeNumToStr(offset);
+  var arr = changeNumToStr(offset || [0, 0]);
+  var left = arr[0] || 0;
+  var right = arr[1] || 0;
+
+  var zIndexStyle = zIndex ? 'z-index:' + zIndex + ';' : '';
   var styleOffset = '';
+
   styleOffset += 'top:' + wrapTop + 'px;';
-  styleOffset += 'right:' + arr[1] + ';';
-  styleOffset += 'left:' + arr[1] + ';';
-  var zIndexStyle = zIndex ? 'z-index:' + zIndex + ';' : '';
+  styleOffset += 'left:' + left + ';';
+  styleOffset += 'right:' + right + ';';
+
   return zIndexStyle + styleOffset;
 };