Activated carbon for benzene, formaldehyde, ammonia and other toxic and harmful gases with high adsorption capacity, can effectively remove gaseous pollutants and harmful odor substances in the indoor air, and thus achieve the purpose of reducing pollution, air purification. The quality of activated carbon adsorption harmful gas can be close to or even up to its own quality, in the air of ordinary family space, the quality of harmful gas is far less than the use of activated carbon, therefore, as long as the activated carbon is often placed in the sun, it can be used for a long time.