Generally, we use UV laser marking machine to mark plastic products. Conventional laser marking machine is widely used in metal and nonmetal marking. Laser marking machine can be applied to digital, text, trademark or machine-readable code, such as data matrix code with high information density and arranged in close space in different scales. UV laser marking machine in plastic marking remarkable: precision marking: plastic laser marking machine laser is a diode pumped laser, with high energy efficiency. Like metal marking machine, it also has good focusing ability, so it is very suitable for fine marking. Diode pumped solid-state laser has a high beam quality, which makes the laser beam in the marking process obtain a small focusing diameter. In this way, the precision marking track width as small as micron can be realized on the micro parts.