Abstract:Hydraulic energy storage system plays important role in prolonging lifespan and improving energy conversion characteristic of the road deceleration zone.The working principle of the hydraulic energy storage system for road deceleration zone was given.The mathematical model of the energy storage system was established,which was solved by utilizing the software of MATLAB/Simulink.Through simulation analysis of the model based on MATLAB/Simulink,relationships between the system dynamic response performance and spring stiffness,spring pre compression value,the piston diameter of energy conversion cylinder,the initial volume of accumulator and charge pressure of accumulator were obtained and analyzed,which provided theoretical basis for design and optimization of the damper for hydraulic energy storage system of road deceleration zone.