P2P 网络相对于CS 模式网络具有去中心化，可扩展性，健壮性，高性能，负载均衡等优点。本文介绍了4 种基于DHT 的P2P 算法：Chord, Can, Pastry, Tapestry。详细分析了各算法的组织结构，查找方法，结点插入退出，路由方法及性能，并对它们的算法效率进行了比较研究。-The P2P network relative to CS mode network to the center of the advantages of scalability, robustness, high performance, and load balancing. This article describes the four kinds of DHT-based P2P algorithm: Chord, Can, Pastry, Tapestry. A detailed analysis of the organizational structure of the algorithm, the way to find, insert exit node, routing method and the performance and efficiency of their algorithm were compared.