Some limitations are involved in traditional adaptive front lighting system (AFS) such as fewer modes,low control accurateness,low light efficiency and hard heat dissipation,etc.This paper proposes an optical scheme of the AFS based on the LEDand the fly′s- eye lens.Using a fly′s- eye lens,the uniform facula with a cut-off line can be achieved in the digital micro mirror (DMD).And the compound parabolic concentrator (CPC) and the bent light pipe are used to collect extra light.By controlling the flip position and the flip frequency of the mirrors of the DMD,the passing beam can be achieved.The simulation results show that the average light efficiency of this system is 43.62%.The results of the light distribution can meet the requirements of the ECE R123.In the DMD,59.46% mirrors work and none of the mirrors is in the“OFF”status.Moreover,this system enjoys the features of high light efficiency and less heat dissipation.