Abstract: In recent years, the development value of swampland is increasing, but its geological condition is very poor, the soil layer is in a flow state, and the wheel excavator locomotive needs a larger turning radius to move. In this environment, the traditional turning is difficult and the balance is poor. On the basis of the research of steering system, we design a four-wheel independent steering hydraulic system. Four wheels can realize independent steering, and are equipped with turntable rotation part and frame lifting part to achieve all-round work and improve working performance.