Abstract: In order to solve the nonlinear problems in the modeling of shaking table array system,refined modeling and simulation of shaking table 9- sub array system of Beijing university of technology were carried out using Matlab/Simulink,the characteristics of servo valve,mesa quality and the effect of oil source pressure on the system frequency response characteristics were analyzed. The study shows that the servo valve frequency exerts great influence on the frequency response characteristics of shaking table system while servo valve damping ratio has little impact on the system frequency response characteristics.