Abstract: In order to comprehend the influences of suspension lever ratio on design parameters of hydro-pneuma-tic spring valves, and design parameters quickly, in this article, through the relationships of throttle-slice thickness and throttle aperture of hydro-pneumatic spring with the suspension lever ratio, the influence ratio and coefficient formula of suspension lever ratio with valve design parameters were established. The influences of suspension lever ratio on throttle-slice thickness and throttle aperture were analyzed, and the lever ratio influence coefficient for design of valve parameters was built. Taking hydro-pneumatic spring as a practical example, the valve parameters were designed and compared with the methods of the analytics design and influence coefficients of suspension lever ratio, and the performance test was conducted for the designed hydro-pneumatic spring. The experiment and design results show that the suspension lever ratio has influence on the valve parameters, which can be linearized for suspension lever ratio in practical design, and the influence coefficient method of suspension lever ratio is reliable, which can speed up the design of hydro-pneumatic sping.