Marking device

The utility model relates to the technical field of laser marking machines, and discloses a marking device which comprises an assembly line and a three-dimensional support arranged on the side edge of the assembly line, a lifting device is arranged on the three-dimensional support, and a laser marking machine is arranged on the lifting device. The laser marking machine is provided with a laser distance measuring device parallel to the top of the assembly line. A groove connecting rod is arranged on the side wall of the assembly line, an electric telescopic rod is arranged on the three-dimensional support, a T-shaped rod matched with the groove connecting rod is arranged on the telescopic portion of the electric telescopic rod, and the T-shaped rod is perpendicular to the groove connecting rod. According to the flying laser marking machine, when products with different heights are switched for printing, the height of the printing head does not need to be manually adjusted, and the height of the printing head c