diff --git a/en/application-dev/reference/apis/js-apis-convertxml.md b/en/application-dev/reference/apis/js-apis-convertxml.md
index e4ffcaa90d6a9ed2c45eff9756ff2e45ae30a2a8..f403580810cb946d98aed4ff2f9808323656e89e 100644
--- a/en/application-dev/reference/apis/js-apis-convertxml.md
+++ b/en/application-dev/reference/apis/js-apis-convertxml.md
@@ -40,13 +40,14 @@ Converts an XML text into a JavaScript object.
 - Example
 
   ```
-  var xml =
+  let xml =
       '<?xml version="1.0" encoding="utf-8"?>' +
       '<note importance="high" logged="true">' +
       '    <title>Happy</title>' +
       '    <todo>Work</todo>' +
       '    <todo>Play</todo>' +
       '</note>';
+  let conv = new convertxml.ConvertXML();
   let options = {trim : false, declarationKey:"_declaration",
                  instructionKey : "_instruction", attributesKey : "_attributes",
                  textKey : "_text", cdataKey:"_cdata", doctypeKey : "_doctype",
diff --git a/zh-cn/application-dev/reference/apis/js-apis-convertxml.md b/zh-cn/application-dev/reference/apis/js-apis-convertxml.md
index 977edb72913320b86962e29b6fbc492398910cca..0e4e1a1c71610ceaca065c396e2f70fc0a7a74fe 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-convertxml.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-convertxml.md
@@ -40,13 +40,14 @@ convert(xml: string, options?: ConvertOptions) : Object
 - 示例：
 
   ```
-  var xml =
+  let xml =
       '<?xml version="1.0" encoding="utf-8"?>' +
       '<note importance="high" logged="true">' +
       '    <title>Happy</title>' +
       '    <todo>Work</todo>' +
       '    <todo>Play</todo>' +
       '</note>';
+  let conv = new convertxml.ConvertXML();
   let options = {trim : false, declarationKey:"_declaration",
                  instructionKey : "_instruction", attributesKey : "_attributes",
                  textKey : "_text", cdataKey:"_cdata", doctypeKey : "_doctype",