In order to effectively mitigate the impact of hydraulic cylinder braking and effectively reduce the energy loss, a hydraulic accumulator was used to build a gravitational potential energy recovery system. The dynamic braking process and energy recovery were analyzed by using AMESim simulation platform.The results show that: in the first 0.5 s, hydraulic cylinder is in uniform motion, subsequently the system enters the braking process and begins to recover energy;starting from 1.4 s, the system is leaking, and the accumulator cannot continue to recover energy, so the brake circuit needs to be cut off by the cutoff valve;when the cutting valve initially produces the braking effect, the return oil flow is already in a very low state, so the buffer chamber will not be greatly impacted;under different accumulator volumes, the braking state of the system does not change, and the energy recovery is basically the same;after increasing the initial pressure of the accumulator, the braking process can be completed in less time and the energy recovered is lower.