(On the basis of the composition of the network communication system. The software design algorithm of network communication under Linux operating system is analyzed in detail. And successfully realized the network communication between the server and the client on the system platform. And choose NS-2 software to bow 1. A. The transmission rate of the TCP protocol of the Nagle algorithm. The network simulation of throughput and delay jitter is carried out, and the research proves that the scheme is efficient and reliable.)