Laser welding method for double-layer transparent plastic plate

The invention discloses a laser welding method for a double-layer transparent plastic plate. The laser welding method comprises the following steps of: coating a metal wire with a layer of molten Zn,and carrying out annealing treatment and shaping treatment to obtain a metal wire of which the surface is of a micro-structure; in molding of the plastic plate, additionally forming a metal wire mounting groove in a to-be-welded region; obtaining a plastic plate comprising the metal wire mounting groove; placing the metal wire of which the surface is of a micro-structure into the metal wire mounting groove of one to-be-welded plastic plate, covering the other plastic plate of which the mounting groove covers the metal wire; clamping and fixing the joint of the two plastic plates, subsequentlystarting a laser device, aligning the laser beams to the metal wire, and moving at a set speed along the metal wire so as to realize welding. According to the laser welding method disclosed by the invention, in laser welding o