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With the rapid development of artificial intelligence, its related technologies have been applied to many fields of production and life, and artificial intelligence has become indispensable on the unmanned platform. Due to the integration of intelligent sensing, traditional bus communication technology is difficult to meet the development requirements of unmanned vehicle network system. The emergence of vehicle-mounted Ethernet can provide an effective solution for the communication system with large amount of data and high integration. The unmanned vehicle network system is designed based on time-triggered Ethernet. Firstly, the communication nodes of the whole time-triggered network system are considered and corresponding communication boards are designed for communication links. In the aspect of board card, TTE switch and end node point system controller are mainly designed. In order to increase the reliability of the whole system, three redundancy communication structure is adopted. The software was developed according to the corresponding functions of the controller and switch, and the communication task requirements of each system were met through system testing and verification. The feasibility and accuracy of the unmanned vehicle network system were verified.