EDI Equipment for short, also known as continuous electric desalting technology, it will be a scientific integration of electrodialysis technology and ion exchange technology, through the cationic, anionic membrane on the cation, anion through the selection and ion exchange resin on the water ion exchange action, under the action of the electric field to achieve the directional migration of ions in water, so as to achieve the depth of water purification and desalting, and produced by hydroelectricity Hydrogen ion and hydroxide ion can continuously regenerate the filling resin, so EDI water treatment production process can continuously produce high-quality ultra-pure water without the regeneration of acid and alkali chemicals.