The single pump multiactuator load sensitive hydraulic system is mainly used as the hydraulic system of the demolition robot, which can realize the realtime matching of pump output pressure and output flow with the load, effectively improve the system efficiency. However, there is still a large energy loss in the complex action when the load and load gap is large. For this reason, a new energy recovery and utilization scheme based on variable displacement regulation technology was proposed to realize the gravitational potential energy recovery when the manipulator was descending and the energy consumption recovery of the pressure compensation valve when the manipulator was in composite action, and the recovered energy was used as auxiliary energy when the manipulator was rising. Virtual.Lab Motion and AMESim were used to establish the joint simulation model of the electrohydraulic system of the demolition robot.The simulation results show that the energy saving efficiency of the scheme can reach 30%~67.6% under different working conditions, and the stability of the manipulators can be improved effectively during descent.