In order to meet the development requirements of construction machinery and improve the energy saving of hydraulic system,a load sensitive electro-hydraulic proportional system pressure compensator was designed.By analyzing the working principle of the new pressure compensator,the simulation model was built based on AMESim simulation platform.The effects of spring stiffness,spring preload and viscous friction coefficient of differential pressure reducing valve on the dynamic performance of the pressure compensator were studied by using the control variable method,and the effects of different parameter combinations on the performance of the pressure compensator were studied by orthogonal simulation,so as to optimize the design of the pressure compensator.Finally,a test platform was built to test the pressure compensator of the load sensitive electro-hydraulic proportional valve.The test results show that the new pressure compensator has good dynamic characteristics,the pressure difference at the main valve port is about 0.52 MPa,and the response time is less than 0.12 s,which verify the correctness of the simulation model.