Abstract:In control system of valvecontrolled hydraulic motor loop, the system stability, control accuracy and response speed are usually not easy be concerned at once, especially in the rotary system of high power performance is more apparent. In order to ensure the stability of the system with high precision of control system, the correction link must be added, and through the precision, stability and response speed, and etc, of comprehensive consideration to select the best matching combination, the best control performance of the system was achieved.MATLAB/Simulink was used for simulation and analysis on their characteristics, and how to affect the dynamic characteristics by changing of system parameters was studied and all kinds of error produced. In the MATLAB command window, the contrast figure of influence of different parameters was drawn. Through the comprehensive consideration of system performance to determine the optimal system parameters and correction, then more effective correction controller conformed to the actual engineering application were worked out. The simulation results show that the control effect of system is satisfactory after correction and selecting appropriate parameters in all aspects.