This product is a new kind of inorganic polymer water purifying agent. It is the hydrolysis product between chloride and aluminum hydroxide, a bridging adsorption ability, soluble in water, hydrolysis process with electrochemical condensation, adsorption and precipitation and other physical and chemical processes, water purification effect is much better than the traditional low molecular water purifying agent such as aluminium sulfide, three chloride iron, ferrous sulfate and alum. Widely used in drinking water, industrial water purification and sewage treatment and other fields.