In order to meet the outfield service requirement of the engine assembled in a aircraft

the research was conducted on low cycle fatigue test of aero-engine disc based on traditional safety life method. The stress state of disc under engine working conditions was calculated using finite element method

while the critical positions and the corresponding standard cycle were confirmed with failure analysis. According to the feature that the disc's stress state was affected by axial loading

the test parameters were confirmed through analogy

and the test rig was designed to apply axial loading to the disc under rotating condition. The research shows: the critical position of the disc is not only related to stress level

but also depends on structure and failure mode. Test design needs to consider the impact on the stress state by axial loading. By adjusting the amount of oil

the test rig can control the axial loading and meet the requirement of various tests with different parameters for the new disc and the used one after outfield service.