The application relates to the field of light and shadow projection equipment, and discloses an automatic adjustment method for a projection area of a
projector. Through the cooperation of a projection offset module and a projection
zoom module, the
projector can automatically correct the position and size of a
projection image by using a start-up image during a start-up process, so that the
projection image of the
projector is clearer, the visual effect during watching is better, the adjustment process is automatic, personal participation is not needed, the use of the projector is more convenient, and the cooperation of a grid division module divides the
projection image into regions, so that the position of an
occlusion and the distance that needs to be adjusted by the projection image can be clearly known. Therefore, the adjustment process is more rapid and smooth, the
trial and error times of the equipment are reduced, the projection image can be maximized in the case of avoiding
occlusion, and the best visual effect is reserved.