The main research direction of this paper is to simulate the detection of vehicles turning of the centrifugal force sensing device, can be divided into centrifugal force and Tilt sensing device design and configure a mechanical sensors for analog obtained when the car is moving steering the produced by centrifugal force, angle, interest centrifugal force steering sensing original management, and the establishment of the tilt and bend the sensor auxiliary lighting fill time relationship between the steering angle degree of the greater, caused by the centrifugal force the larger, lighting complement light time is more short. Vehicle body tilt angle auxiliary light angle model to calculate the turning angle of the vehicle speed and climbing tilting Dou degree the assist beam angle model derivation, and automatically adjust the angle of nearly light irradiation center. In order to automatically control the assist light of winking status