During the printing process of the flexo printing machine, there is a certain contact time between the surface of the anilox roller and the surface of the printing plate, the surface of the printing plate and the surface of the substrate. The printing speed is different, and its contact time is also different. the more fully the transfer of ink, and the greater the amount of ink transferred. For the solid version, or mainly lines and characters, and the substrate is absorbent material, if the printing speed is slightly lower, the printing effect will be better due to the increase in the amount of ink transferred. Therefore, in order to improve the performance of ink transfer, the printing speed should be reasonably determined according to the type of printed graphics and the performance of the printing material.