For active steering control strategy of steering-by-wire system, the control strategy for active steering based on adaptive fuzzy PI theory is studied in this paper. Determine the principal of active steering. The controller is designed, which use the actual yaw rate and ideal yaw rate, actual vehicle slip angle and ideal vehicle slip angle as input. The active steering control model is built based on the Matlab/Simulink and CarSim. select the fish hook step condition to verify the control strategy by simulation test. The simulation results show that the active steering control strategies enhance the vehicle stability.