In order to solve the problem that the lifting hydraulic system of electric dump truck needs to consume large power and pump mptor is difficult to match, a new type of dump truck hydraulic lifting way is proposed. By means of a small power motor matched with an accumulator, a hydraulic lift for the lifting of the hydraulic system was provided. A hydraulic valve block for the lifting system was designed, which is all composed of screwin cartridge valves. It was compact in structure and could realize four movements of lifting, stopping, dropping, floating. Through analysis, the 50 tons of dump truck used this scheme could make the lifting of power decreased from 538 kW to 138 kW, and it could ensure that the lifting of time was reasonable. Besides, Automation Studio simulation software was used to model and to simulate research the lifting hydraulic system. The simulation results show that the lifting system meets the effective demand. The purpose is to provide a new idea for the design of electric mining dump truck lifting hydraulic system.