Amino tris(methylene phosphonic acid) has good chelation, low limit inhibition and lattice distortion, which can prevent the formation of scale salts in water, especially calcium carbonate scale. Amino tris(methylene phosphonic acid) has stable chemical properties in water and is not easy to be hydrolyzed. When the concentration of aminotrimethylene phosphonic acid in water is high, it has good corrosion inhibition effect. This product is mainly used in thermal power plants, refineries of circulating cooling water, oilfield water injection system. It can reduce the corrosion and scaling of metal equipment or pipeline. Amino tris(methylene phosphonic acid) can also be used as chelating agent of metal ions and surface treatment agent of metal ions in textile printing and dyeing industry.