With the development of the military avionics system, airborne data bus transfer rate is higher and higher, the standard GJB289A bus (1 mbps) have been unable to meet the demand of the development of high throughput airborne data bus, so the highspeed GJB289A bus technology is one of the current development trend of airborne data bus.In order to study of highspeed GJB289A bus technology, in particular the need to build a simulation system.This paper introduces how to build a highspeed GJB289A bus simulation system, topological structure, working principle, supporting software, further expounds the importance of highspeed GJB289A bus simulation system, for the subsequent research and engineering application of highspeed GJB289A bus to provide technical basis.