P2P 技术当中的 BT 技术是新一代网络技术研究的热点,该文只针对 BT 的客户端进行了描述,包括客户端的功能以及它与 tracker 服务器之间客户端与其他的客户端之间的通信任务以及实现客户端高效的上传和下载时需要的一些优越片断选择算法、阻塞算法并通过举例明了空间分配算法。最后是对 BT 应用的一个展望。 The BT technology in P2P technology is a hot topic in the research of next-generation network technology. The article only describes the client of BT, including the function of the client and the task of communication between the client and other clients with the tracker server As well as some excellent fragment selection algorithms which are needed in order to efficiently upload and download the client. The blocking algorithm is illustrated by examples and the space allocation algorithm is illustrated. Finally, a prospect for BT applications.