Abstract: Aim at time triqgered Ethernet,it can meet the application requirements of high bandwidth,low latency,and high reliability.This paper proposes a design scheme for a time triggered Ethernet interface that can be compatible with traditional Ethernet and achieve degraded transmission of critical traffic.The implementation of the time triggered Ethernet interface has been completed,and key indicators such as data frame transmission and reception delay have been simulated and tested. Finally, a comparison has been made with bus of 1553B,the results indicate that this interface can meet the current requirements for space data transmission and can be applied to various high bandwidth, latency,and high reliability data transmission scenarios for space applications.