A new efficient COD degrading agent. It is composed of a variety of inorganic salts and a variety of additives, with white appearance and light yellow powder. Collective adsorption, oxidation and other treatment technologies can rapidly and efficiently decompose pollutants such as organic matter in water to effectively reduce COD, with removal rate of more than 95%. It is the preferred wastewater treatment agent to solve the problem of COD exceeding the standard. The product has strong adaptability to the changes in temperature, turbidity, alkalinity and organic matter content of raw water.