The main research is the working conditions of the hydraulic vibrator with the frequency modulation rotary valve. Use the hydraulic vibration technology knowledge to set up a hydraulic system model and then use AMESim to establish and analyze the simulation model. So the working curves of dynamic characteristic were gotten. It is useful to analyze the parameters for production and application of the aging stress elimination devices. AMESim is abbreviation of Advanced Modeling Environment for Simulation of engineering systems. AMESim offers a complete platform for systems engineering design, allows users on a single platform to create systems models of complex multi-disciplinary field, so to make simulation and in-depth analysis. On AMESim platform, users can research steady-state and dynamic performance of any component or system.