Vehicle lamp capable of automatically providing auxiliary turning light

The vehicle lamp capable of automatically providing auxiliary turning lighting has one control circuit comprising one microprocessor and one side angle detecting unit and one driving circuit to drive the motor for lamp rotating unit. The side angle detecting unit detects the side angle of the running vehicle and feeds the angle information to the microprocessor, the microprocessor calculates the turning angle and outputs motor controlling signals to the driving circuit, and the driving circuit regulates the lamp reflector to turn corresponding angle. In this way, the vehicle lamp detects the turning angle to regulate lighting angle automatically to light the turning direction so as to raise the safety of running in curved road at night.