The water purifier is also called a water purifier and a water purifier. It is a water treatment equipment that performs deep filtration and purification treatment on water quality according to the requirements for use of water. The water purifiers usually mentioned are generally used as small purifiers for household use. The core of the technology is the filter membrane in the filter element device. At present, the main technology is derived from the ultrafiltration membrane and the RO reverse osmosis membrane. The water purifier can effectively remove rust, sand, colloid and adsorbed chlorine, smell, color, pesticide and other chemical agents in the water. It can effectively remove impurities such as bacteria, germs, toxins and heavy metals in water. The application of water purification technology in the field of drinking water makes the phenomenon of “acclimatization” soon become a history, effectively solving the local diseases caused by excessive harmful substances in groundwater in many places.