In this paper, based on the background of the landing soil of the probe, the coupling dynamics modeling and simulation analysis of the soil contact problem are carried out. Combined with the discrete element method and the multibody dynamics method, the coupling dynamics simulation of the soil drop problem of the hemispherical shell device is carried out. By comparing with the experimental results and finite element simulation results, the validity of the discrete element method is verified. The effects of particle size, recovery coefficient, static friction coefficient and other parameters on the collision acceleration, collision duration, vibration waveform and other dynamic responses of the object and particle field in the collision are analyzed. This study will expand the theoretical understanding of the rigiddiscrete coupling dynamics and provide technical support for the design of the landing system of the problem.