Aiming at scissor-type aerial work platform′s problems such as large pressure impact when fast walking startup,large overflow loss in non-working state,and obvious abnormal noise when turning and walking,the hydraulic system was optimized by adding energy storage buffer device,setting bypass unloading circuit,and reasonably setting oil make-up circuit.Theoretical analysis was conducted on energy loss,priority valve characteristics,turning characteristics,etc.AMESim software was used for simulation analysis,and finally the real vehicle test was completed.The simulation and test results show that after optimization,the pressure impact at the start of fast walking is reduced by about 1.5 MPa,and the energy consumption in non walking state is also reduced,the oil filling effect of the outside motor is obvious during fast turning and walking,and the abnormal sound problem is effectively solved.The optimized design improves the stability and energy-saving of the walking hydraulic system of the scissor-type aerial work platform to a certain extent,and provides theoretical basis and practical experience for further optimization design and application promotion.