Based on the developing requirement of the integrated space electronic system network in future, this paper introduces the existing framework of spaceborne electronic system.On the basis of its advantages and disadvantages,a high-speed and high reliability real-time network architecture is proposed. The protocol architecture,network topology,working principle, and network terminal key equipment are introduced.Moreover, the characteristics of 10 Gb/s transmission bandwidth,sub-microsecond clock synchronization precision and multi-channel redundant transmission mechanism can meet the application needs of future space environment.The study of large capacity real-time network provides a promising solution for the future integrated space electronic system network.