In color printing, how to rationally arrange the order of color overprinting is an important subject studied by process technicians. An important function of printing is to copy original manuscripts artistically, which requires printing workers to have a certain degree of artistic appreciation and the ability to master color changes. Improper color sequence arrangement may cause problems such as color shift, color mixing and reverse overprinting of printed products; scientific color sequence arrangement will make the color of printed products closer to the original, and even strengthen a certain color atmosphere, so that the level is clear, the dots are clear, and the overprinting is accurate. The colors are true, natural and harmonious.