Abstract:A design scheme of the proportional pressure regulating valve was proposed, in which the internal flow passage of the valve body was taken as the pressure regulating mechanism.Based on the analysis of flow passage and throttle regulating principle, the structure and working principle of the valve were described. The experiments of the valve in place leakage, proportional pressure characteristics and dynamic response characteristics were made. The results show that the proportional pressure regulating valve has simple structure, good proportional linear pressure regulating characteristics, which can be applied in practice.