本文探讨了使用AuthorWare7．0制作多媒体课件时背景音乐的控制方法——使用声音图标、变量、DirectMediaXtra插件、外部函数四种方法；重点说明了通过使用外部函数如何实现随机循环播放背景音乐。进而使课件中声音的播放和控制更加方便、快捷，同时多媒体课件更加灵活、生动。

This article discuss about the control methods of background music in making multimedia courseware by using authorware 7．0，which use voice icon、variability、DirectMediaXtra Plug-ins and external functions；emphasize how to play background music randomly by using external function．So that it is very convenient and fast to control the background music in multimedia courseware，then the multimedia courseware become flexible and vivid．