The invention discloses a raster anti-counterfeiting method for hiding the anti-counterfeiting information in a color channel. The method comprises steps of (1), preparing and preprocessing originals;(2), dot displacement; (3), dot percentage hierarchical improvement; (4), image synthesis; and (5), decoding. The method is advantaged in that dots of an original screening image are microscopicallyprocessed at different levels, coding concealment and extraction identification are improved, and operation difficulty is reduced.