我用的开发工具是：Flash Professional CS5.5

新建一个AS3项目，保存fla文件为:f1.fla，另新建一个as3文件，文件名：Main.as，代码如下：

package  {import flash.display.MovieClip;import flash.net.URLLoader;import flash.net.URLRequest;import flash.events.Event;public class Main extends MovieClip {var url:URLRequest = new URLRequest("data.xml");var loader:URLLoader = new URLLoader(url);var myXML:XML = new XML();public function Main() {loader.addEventListener("complete", success);}private function success(event:Event):void{myXML = XML(loader.data);trace("cc0: [" + myXML.name() + "]#");trace("cc0: [" + myXML.nname + "]#");trace("cc1: [" + myXML.child(0) + "]#");trace("cc1: [" + myXML.child(0).length() + "]#");trace("cc2: [" + myXML.child("age") + "]#");stop();}}
}

xml文档：data.xml

<root><nname>Hello</nname><age>25</age>
</root>

按Ctrl Enter运行：

cc0: [root]#
cc0: [Hello]#
cc1: [Hello]#
cc1: [1]#
cc2: [25]#

说明：as3中可以直接按结点名进行访问，也可以通过child来访问结点.