In order to reduce the overturning risk of shearer carrier in loading and transportation,the advantages and disadvantages of common position error leveling method and angle error leveling method were analyzed.On this basis,an improved position error leveling method was proposed.The coordinates of each point on the platform in the vertical direction were obtained by analysis and calculation.By calculating the plane equation of the platform and combining the geometric relationship of each support point,the vertical velocity of each point was obtained,and the leveling control strategy for the suspension system was formed.Through the joint simulation of AMESim and Simulink,the simulation model of the suspension system was established.The stable boundary law and trial-and-error method were used to determine the proportional,integral and differential coefficients and their fuzzy amplification coefficients.Therefore,the dynamic response characteristics of the multiple directional control valve were optimized by using the fuzzy PID controller,and the overshoot in the response process was reduced.The simulation results show that during the lifting process of the suspension system,the vertical displacement difference between each support point does not exceed 2.0 mm,and the pressure difference between each suspension cylinder is less than 0.1 MPa,which means there will be no weak leg.Finally,the control performance of the suspension system was analyzed by experiments.The results show that the maximum displacement error in the actual lifting process is less than 5.0 mm.Combined with the size of the shearer carrier,the inclination angle of the body platform in the length direction is 9.16×10-4 rad,and the inclination angle in the width direction is 1.27×10-3 rad,which is within the allowable range of work.So,the effectiveness of the scheme is verified.The research content provides a new idea for the suspension system leveling strategy and overcoming the weak leg in the leveling process.