The ground seismic sensors is working basing on the dynamic response of the ground,the ground displacement and acceleration are the results of the propagation of the seismic focus in the crust,it is a complex dynamic problem of comprehensive consideration of the incident wave disturbance and the seismic response of the oscillatory system mechanism which needs to be solved. In this paper,the method of wave function series,the plane wave expansion and Newtonian dynamics equation were used to study the seismic response of the oscillatory system under the disturbance of the out-of-plane incident wave,and the variations of the relative displacement of the mass to the ground along with the disturbance frequency,incident angle are investigated,the numerical results of the given example show that the existence of the phenomenon of sympathy,and accord with the conclusion of vibration mechanics.