When processing a metal laser cutting machine, the outside of the hole may be cooled, but a part of the small hole in a single hole has a small heat diffusion space, and excessive heat concentration will cause excessive combustion and slag. In addition, when cutting thick plates, the accumulation of molten metal on the metal surface and the accumulation of heat during the perforation process will cause confusion in the auxiliary airflow, and excessive heat will be input, causing edge burns.