针对低误码率有线网络所设计的TCP协议,具有使用广泛、算法成熟、可移植性好等优点,然而卫星链路自身的高误码率、长传播时延、高时延带宽积等因素导致了TCP性能的大幅下降。这使得传统TCP协议应用到卫星网络时性能不理想。本文在梳理TCP协议特点的基础上,对卫星链路影响TCP性能的原因进行了分析,并提出了几种基于卫星链路传输TCP协议的性能改进方法。 However, the high bit error rate, long propagation delay and high delay bandwidth product of the satellite link have many advantages such as wide application, mature algorithm and good portability. Led to a sharp decline in TCP performance. This makes the traditional TCP protocol performance is not ideal when applied to satellite networks. Based on the characteristics of TCP protocol, this paper analyzes the reasons why satellite links affect TCP performance and proposes several performance improvement methods based on satellite link transmission TCP protocol.