Abstract: The course named computer communication network is an important course of communication engineering and other related majors, but the content of the experiment is too boring to stimulate the students interest. This paper carried out a reform on the computer communication network,developed the Socket server and Socket client designed a man-machine interface based on TCP / IP protocol, and increased network testing contents, and also developed a series of experiments based on the OPENT networt simulation. This reform enriched the content of experiment of computer communication network, and will be conducive to the students practical ability and comprehensive quality, and lay a good foundation for the future employment.