The pressure stability at the outlet of the traditional directacting pressure reducing valve is poor, especially when the applied load changes suddenly.In order to solve the problem, a new type of pressure reducing valve was designed.The dynamic characteristics of the valve were analyzed, and the simulation model of the pressure reducing valve was established by using AMESim.The influence of the key parameters such as the diameter of the pressurestabilizing damping port, the mass of the pressurestabilizing piston and the pretightening force of the pressurestabilizing spring on the performance of the valve was simulated and analyzed.The results show that the diameter of the damping port has great influence on the dynamic characteristics of the valve, while the mass of the stabilizing piston and the pretightening force of the spring have a small influence on the dynamic characteristics of the pressurereducing valve. The conclusion provides reference for the improvement and optimization design of the pressure reducing valve.