In order to study the complex stress condition of the wheel bearing of the aircraft under different working conditions,especially at the moment of landing,a heavy load impact testing machine for the wheel bearing of the aircraft was designed.The testing machine was used to simulate the radial and axial static load test,dynamic load spectrum fatigue life test,impact load bearing capacity test,brake test and so on.Through careful analysis and computational simulation,a heavy load impact loading system for simulating the loading condition of aircraft wheel bearing at the moment of landing was realized.