In order to improve the response speed and accuracy of the hydraulic system position control,the hydraulic system position control and performance analysis under the swashplate control strategy were studied.Based on the construction of the position control circuit of the hydraulic system,the control strategy was described.The motor dynamic equation was obtained through the pump speed,and the motor torque was calculated by using the electromotive force of the rotor.The sliding mode control method was used as the control core of the two hydraulic systems,and the swashplate control system was modeled by using MATLAB/Simulink.Based on the established swashplate control model,the position control performances of the hydraulic system were compared and analyzed between the swashplate control strategy and the frequency conversion drive control strategy.The results show that the swashplate control has better responsiveness and control stability than the frequency conversion drive control;the control accuracy of the swashplate control is 47.67% and 48.58% higher than that of the variable frequency drive control respectively when the step and sinusoidal reference position are tracked,the control accuracy of the swashplate control is better than that of the frequency conversion drive control.It is shown that the swashplate control strategy is more suitable for the position control of the hydraulic system than the frequency conversion drive control strategy.