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Automobilespsila maneuverability, security and comfort are very important. To obtain the ideal steering stability and cornering portability of vehicles in any conditions, a multi-body dynamic model of automobile equipped with electric power steering system (EPS) is established in Matlab/Simulink and ADAMS. A new control method is presented which combined control strategy with parameter compensation method. The simulation results show that, yaw compensation can improve the stability of automobiles when steering a large angle on slippery roads; Return compensation can improve the lack of returning ability when steering at a low speed. This EPS can improve both the steering portability and road feeling.