In order to study the influence of opposed end curve-face gear piston pump parameters on the dynamic characteristics of the pump,the motion equations of the plunger were derived according to the operating principle of the end curve-face gear piston pump.A joint simulation model of the opposed end curve-face gear piston pump was established by using Adams and AMESim software,and the corresponding curves of the outlet flow and pressure of the piston pump at different rotational speeds and eccentricity were obtained by the joint simulation.The results show that as the speed increases,the pump outlet flow and pressure increase,and the pulsation amplitude and pulsation frequency increase;as the eccentricity increases,the pump outlet flow and pressure increase,the pulsation amplitude increases,and the pulsation frequency remains unchanged.