Main features of automatic flexo printing slotting die cutting machine is that the image and text on the printing plate are concave and the blank part is convex, which is just opposite to the layout structure of letterpress. When the High speed ink flexo printer die cutter slotter machine  prints monochrome, it first immerses the printing plate in the ink tank to roll, and then the entire printing plate surface is coated with ink layer. Then, scrape off the ink layer of the blank part on the printing plate surface, and the convex part forms a blank, while the concave part is filled with ink. The deeper the concave part is, the thicker the ink layer is. The high-speed printing press transfers the ink in the concave part to the printed matter through the pressure, so as to obtain the printed matter. When printing multi-color, the overprinting method or indirect partial ink-coating method is used, so that the ink of various colors can be distributed on the relevant parts of the printing plate surface as required. The basic printing principle of multi-color printing is the same as that of single color printing. There are two main types of printing plates used by high-speed printing machines. One is photogravure, that is, photogravure; The other is engraving. Engraving of engraving plate includes manual carving, mechanical carving and electronic carving.