EDI(Electrodeionization), also known as continuous electro-deionization technology, scientifically integrates electrodialysis technology and ion exchange technology. Through the selective permeation of cations and anions by cation and anion membranes and the exchange of ions in water by ion exchange resins, it achieves the directional migration of ions in water under the action of an electric field. Thus, it achieves deep purification and desalination of water, and continuously regenerates the filled resin through hydrogen ions and hydroxide ions produced by water electrolysis. Therefore, the EDI water production process does not require acid or alkali chemicals for regeneration and can continuously produce high-quality ultrapure water. It has the advantages of advanced technology, compact structure, and simple operation It can be widely applied in the fields of power, electronics, medicine, chemical engineering, food and laboratories, representing a green revolution in water treatment technology.