In recent years, the development of Distributed Integrated Modular Avionics (DIMA) brings higher demands on aviation electronic networks.Time Triggered Ethernet(TTE) can guarantee strong real-time communication, improve the quality of network service and indicate the upgrade direction for aerospace electronic networks.In this paper, the requirement of avionics system to network communication is summarized, the characteristics of the avionics network are described, and the advantages of Time Triggered Ethernet are pointed out.The analysis to Time Triggered Ethernet shows that it can satisfy the upgrade of avionics system and is an important direction of the new-generation aircraft network technology in the future.