The invention discloses a method for eliminating edge sawteeth of images. The method has the advantages that the transparency of the outermost peripheral edges of the original images is reduced to obtain processed images, then rotation operation or matrix operation is carried out on the processed images, accordingly, obtained result images can be in natural transition to backgrounds, previewed sawteeth are not obvious or can be prevented, and good visual effects can be realized; algorithms of the method are simple, the method is high in processing speed, and operation is simple and convenient.