EDI ultra-pure water equipment EDl(Electrodeionization), also known as continuous electric desalting technology, it scientifically integrates electrodialysis technology and ion exchange technology. Through the selective transmission of Yang and anion by Yang and anion membrane and the exchange of ions in water by ion exchange resin, the directional migration of ions in water is realized under the action of electric field, so as to achieve the deep purification and desalt of water, and the continuous regeneration of the loading resin is carried out by hydrogen ions and hydroxide ions generated by hydroelectrolysis. Therefore, EDI water process can continuously produce high-quality ultra-pure water without the regeneration of acid and alkali chemicals. It has the advantages of advanced technology, compact structure and easy operation, and can be widely used in power, electronics, medicine, chemical industry, food and laboratory fields, which is the green revolution of water treatment technology.