It is a chemical adsorption of commonly used materials, new environment-friendly catalyst advanced. It is the use of strong oxidizing potassium permanganate, the harmful gas in the air oxidation decomposition in order to achieve the purpose of purification. The harmful gases sulfur oxides(so2), methyl, acetaldehyde, nitrogen oxides, hydrogen sulfide and low concentrations of aldehydes and org acids have very high removal efficiency. Often used with activated caybon in combination to improve the absorption efficiency. It could be also used in vegetables and fruits as adsorbent of ethylene gas.