In order to reduce the energy waste in unmanned aerial vehicle(UAV) recovery process,an energy recovery system for UAV recovery process was adopted.The mathematical models of the main components of the system were derived,and the AMESim simulation model of the whole system was established and simulated.The effects of accumulator volume,accumulator precharge pressure,recovery device quality and UAV quality on energy recovery efficiency were studied.The results show that accumulator volume,accumulator precharge pressure and UAV quality have great influence on recovery efficiency,which are the key parameters affecting energy recovery efficiency of accumulator.