Various energy recovery and reuse systems have gradually been proposed for the working condition that the large potential energy is converted into heat energy when the excavating manipulator is descending.An energy recovery system for excavating manipulators based on the theory of flow regeneration and balance was proposed.In this system,when the boom was lowered,part of the potential energy was directly used through flow regeneration,and the other part of the potential energy was stored in the accumulator in the form of hydraulic energy through the balance circuit;and when the boom was raised,the part of the energy was released to complete the recovery and reuse of energy.AMESim was used to build the traditional excavator working device model and the energy recovery working device system model,and the optimal values of the main parameters were obtained in the energy recovery system through calculation and analysis.The simulation results show that the energy recovery system can recover and utilize 37.25% of the potential energy of the excavating manipulator after parameter optimization.At the same time,in a typical working cycle of the excavating manipulator,the energy recovery system with optimized parameters can achieve 55.52% flow regeneration and 31.64% energy-saving effect compared with the traditional excavating manipulator system.