FDS（Fire Dynamics Simulator）作为研究火灾中烟气传播规律以及火灾预防研究的开源代码，在科学研究和工程实践中得到日益广泛的应用，本文简要介绍了该软件的特点、安装平台、编译、使用方法以及注意事项，在文章末尾给出了几个典型的应用实例。-FDS (Fire Dynamics Simulator) as the smoke of the Fire spread rule and Fire prevention study of open source code, in scientific research and engineering practice get day by day the widespread application, this paper briefly introduces the features, installation of the software platform, compilation, use method and matters needing attention　in the end gives several typical examples of application.