Aiming at the hydraulic actuator system of wet clutch, based on the working principle and structure, the mathematical models of the crucial components such as the proportional pressure solenoid valve and the piston of the clutch cylinder were established in the mechanical and hydraulic domain respectively, and the hydraulic actuator system of the wet clutch was modeled by AMESim software. In order to verify the validity of the model, the dynamic response of the system was analyzed under the given different excitation currents. For the AMESim model, the traditional PID algorithm and the modelbased feedforwardfeedback algorithm were used to control the output oil pressure, and the tracking effect was compared and verified. The results show that this model has good dynamic characteristics, and the feedforwardfeedback algorithm is better than traditional PID algorithm.