On the basis of theoretical analysis,AMESim software was used to analyze the effect of changing the control valves structural parameters on the dynamic response of the working support devices hydraulic system.Multiple sets of simulation data and simulation curve were gotten.Through analyzing the simulation results and test data,the main parameters affecting the hydraulic systems features of the working support device were found out,and the correctness of the model was verified.The research results provide references for the selection of structure parameters of the control valve and improving the performance of the hydraulic system.