The flexographic Machine printing plate is wrapped on the surface of the printing plate cylinder, and it changes from a flat surface to an approximately cylindrical surface, so that the actual length of the front and back of the printing plate changes, while the flexographic printing plate is soft and elastic, so the printing surface of the printing plate changes. Obvious stretching deformation occurs, so that the length of the printed image and text is not the correct reproduction of the original design. If the quality requirements of the printed matter are not high, the length error of the printed image and text can be ignored, but for fine products, measures must be taken to compensate for the elongation and deformation of the printing plate.