In this paper, the synchronization mechanism and synchronization protocol control flow of time-triggered Ethernet (TTE) is illustrated in detail. The key technologies involved in time-triggered Ethernet synchronization, such as protocol control frame (pcf) interaction, permanence function, compression function and clique detection function, are discussed. Furthermore, the simulation model of standard-integrity time-triggered Ethernet is established, and its synchronization process is simulated. The results show that time-triggered Ethernet has distributed synchronization capability, which can support the deterministic real-time communication requirements of typical avionics systems.