Laser printing device

The invention discloses a laser printing device which comprises fixed rods, a first laser device, a second laser device, a connecting piece and a connecting plate. The fixed rods are arranged on the two sides of a second shell correspondingly. The first laser device and the second laser device are installed on the tops of the two fixed rods correspondingly. Through the cooperation of a stepping motor, a gear, a rotating shaft, bearings and a chain conveying belt, products are conveyed by the chain conveying belt to flow to a marking area to be marked, the chain conveying belt automatically moves forward by one position after marking is completed, marking is ceaselessly performed, and the taking actions of personnel are reduced. Jigs on fixed rotary clamps are designed through profiling, sothe products are fixed and positioned precisely; and the products flow to the marking area through the chain conveying belt, bidirectional marking is performed through the first laser device and thesecond laser device, each