Mirror-rotating device for laser working

The utility model relates to a laser processing device, which comprises optical lenses, a lens cone and the rotary supporting device, wherein, the optical lenses are plano lenses that can penetrate the laser beams emitted by a laser, and a holding rack of the lenses is provided with two supporting axles that are sheathed in coaxial holes on the wall surface of the rotating lens cone, so that a revolution support by which the plano lenses can rotate around the supporting axles is formed. The holding rack of the plano lenses is additionally connected with a rotating rod for regulating the arrangement angles of the plano lenses as required. The plano lenses can cause incoming laser beams to move horizontally in axial lines with unchanged directions, and holes that are processed to form on workpieces are straight holes and have the advantages of small laser energy loss.