The current laser cutting machine cutting power continues to grow, the cutting thickness continues to increase, laser cutting machines and welding equipment in the production of harmful fumes generated in the process of multiplying. And laser cutting for thermal cutting, in the cutting process produces a large number of fine harmful fumes, such as acetaldehyde, rosin acid, isocyanates, nitrogen oxides, sulfides, hydrocarbons, etc., on the health of workers and the entire working environment is harmful.