In order to improve the traditional Transmission Control Protocol(TCP)performance in wireless networks,this paper solves throughput rate model of three TCP protocols,TCP Reno,TCP Vegas and TCP/ NC based on network coding through Matlab,and analyzes the theoretical value of the three models in different networks,and verifies whether TCP/ NC model can improve its throughput rate. The three models are simulated through NS-2,and simulation results show the effectiveness of TCP/ NC protocol and its analysis mode...