The working condition and energy recovery technology of loader were analyzed, and a new type of hydraulic system for driving braking energy recovery and auxiliary drive of wheel loader was designed. The system can be used to realize the twoway work of the energy recovery and the auxiliary drive, because of the switching of three position four way valve, the accumulator in a working cycle works two times, that is, two times charge and two times discharge, so as to recover more braking energy. The results show that the system has better energy saving effect, and has the function of emergency response.