Automatic headlight aiming device for vehicles

The present invention changes the headlight optical axis of a vehicle in relation to an inclination angle during normal control and to properly adjust the optical axis according to information including front information about a car ahead. The headlight optical axis is adjusted based on the inclination angle of a vehicle, road information in the direction of travel, presence of a car ahead, a distance between vehicles, and the center optical axis angle corrected according to changes in horizontal and vertical behavior of the car ahead.