Abstract: Ethanolamine solution reactivation is of great significance for maintaining the cleaning of ethanolamine solution and the steady operation of natural gas desulfurization unit. At present, ethanolamine solution reactivation technologies at home and abroad have low removal rate of vesicant impurities in ethanolamine solution, so ethanolamine solution foaming which is the most intractable problem for natural gas purification plant hasn't been solved yet. In addition, it is also intractable that the H₂S selective absorption performance of the ethanolamine solution declines after it being reactivated by the imported equipment. Therefore, a new ethanolamine solution reactivation technology by which more than 50 kinds of vesicant impurities and seven kinds of heat stable salts can be deeply removed simultaneously has been successfully developed by Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company. The amplification test results of the new technology showed: (1) It successfully solved the problem of contaminated ethanolamine solution foaming; (2) it also solved the problem that the H₂S selective absorption performance of the ethanolamine solution declines after inorganic heat stable salts being removed; (3) the performances of contaminated ethanolamine solution after being reactivated by it are recovered as the fresh ethanolamine solution; (4) in addition, it has the characteristics of mild operating conditions, low energy consumption and small ethanolamine loss; (5) the technical level is superior to the same technology at home and abroad, and has reached the international advanced level.