(As a DIS system, the hydroacoustic bait simulation system, network communication plays an important role in physical support. This paper briefly describes the communication protocols and equipments commonly used in computer communication networks. Regarding the characteristics of large amount of network transmission information, high real-time and reliability requirements in the underwater acoustic hostile simulation system, a network communication structure suitable for the system is proposed. Describes the termination method of network communication in the system, and provides test results)