The invention discloses an air purifying agent, which is composed of component A and component B. The component A is a liquid reactant prepared by percarbamide, diammonium phosphate, ammonium chloride, sodium lignosulfonate, tea polyphenol, water-soluble essence, and deionized water, while the component B is a solid reaction adsorbent prepared by a porous adsorbent, tourmaline, and a load reaction absorbent. Compared with similar products on the market, the air purifying agent of the invention has the advantages of rapid cleaning and lasting effectiveness. With the dual efficacy of sterilization and disinfection, and volatile pollution gas clearing, the air purifying agent has thorough effects and can generate objects with low toxicity or no toxicity. Characterized by easily available rawmaterials, simple preparation, low cost, and convenience for industrial production, the air purifying agent provided in the invention is proved by experiments to have a removal effect up to over 92% for high, medium and low concentration pollution.