In view of the defects of the traditional passive suspension,such as poor road adaptability,low safety and unsatisfactory damping effect,a new electromagnetic suspension system for automobile was designed.By adding the actuator of electromagnetic suspension system to the McPherson passive suspension system,which was in parallel with the automobile spring and hydraulic damper,the damping force of the suspension system could be increased,and the vibration of the automobile body caused by the fluctuation of the road surface could be greatly reduced,so as to improve the safety and ride comfort of the automobile.Three initial structures of the automotive electromagnetic suspension system actuator were designed.Combined with Ansys/Maxwell magnetic field analysis software,the influence of different structures on the main power generated by the actuator of automotive electromagnetic suspension system was studied.The influence of each dimension parameter of automotive electromagnetic suspension system actuator on the main power was analyzed by combining the orthogonal test method.Then the range analysis of the simulation results was carried out,a group size parameter of the maximum main force generated by the actuator were selected,including coil 1 radial length 8 mm,coil 2 axial length 42 mm,coil 1 and 3 axial length 20.5 mm,magnetic ring 2 axial length 13 mm,magnetic ring 1 and 3 axial length 5 mm,so as to achieve the relative optimal structure.