Abstract:Due to the good performance in the multi-actuators system driven by single pump and high energy efficiency,the load-sensing system is widely applied in small and medium sized engineering equipment and industrial equipment.At present,there are two main types of compensation system,which are the pre-compensation system and the post compensation system.In order to have a knowledge of the working performance and energy efficiency about the load-sensing system,the simulation models of these two system were built based on the detail structure.The research focused on the difference of these two systems when single actuator and more than one working simultaneously.The results show that the structure of the valve used in the post compensation system is more impact.And there is no required about shuttle valve network.However,the energy efficiency of the post compensation system is poor than the pre-compensation system.