TCP（transport control protocol）的性能在很大程度上取决于其所使用的拥塞控制算法。传统的TCP在实现多种拥塞控制算法集成的过程中会出现种种问题。Linux TCP 可以实现多种拥塞控制算法的优化集成，本文分析了linux TCP 的独特实现方法，并将其与传统实现和IETF 规范作了相应比较。关键词： 传输控制协议；拥塞控制；窗口调整Abstract: The performance of TCP（transport control protocol）lies on it’s congestion control arithmetic deeply. Conventional TCP will bring some problems in the process of actualizing multifold congestion control mechanism’s integration. Linux TCP can actualize multifold congestion control mechanism’s optimizing integration.This paper analyzes linux TCP’s particular realization method and compares itself with conventional actualizing and IETF criterion.Key words: TCP; congestion control;window adjusting