As an important digital hydraulic component,high speed on-off valve is used in engineering vehicles.Studying its basic characteristics is conducive to optimize product and improve product performance.A theoretical model was established according to the structural parameters and working principle of the high speed on-off valve;according to the established theoretical model,the AMESim was used to complete the establishment of the simulation model;finally,the effects of driving voltage,coil turns,duty cycle,spring preload and stiffness on the performance of high-speed on-off valve were analyzed through simulation results.Meanwhile,how the opening time and closing time of the valve and the above parameters affect the dynamic characteristics of the valve was pointed out.