Since the heave motion generated by surge has a huge negative impact on the operation of the mining vessel,a heave compensation system is needed to ensure the safety and stability of the mining vessels operation.Heave compensation system can be divided into passive,active and active-passive types.The active-passive type is a combination of active and passive modules.To deal with the shortcomings of passive compensation accuracy is not high and the energy consumption of active compensation system is too large,a set of active-passive heave compensation system was designed.The 2 MN active-passive heave compensation model was built by using AMESim software,which was combined with the relevant experiments to prove that the simulation model was credible.Then the energy consumption and power of the active module of the active-passive heave compensation system were simulated under different loads,different wave periods and different wave amplitudes.The results show that the average contribution ratio of the active compensation module power is about 20%,and the passive compensation module bears about 80%,which reflects the energy-saving nature of the active-passive heave compensation system.