At present, there are more and more manufacturers, and there are more and more shell materials for flashlights, generally plastics, metals, and metals with electroplating layers. In order to better enhance their brand awareness, manufacturers will mark their own brand logos on their products. The product logo marked by the traditional ink jet coding method is easy to fade and fall off, and the brand sense is not high, which cannot bring the effect of promoting the brand to the manufacturer. The logo text information identified by the laser marking machine is not only clear and beautiful.