The molecular structure of sodium 3- chloro -2- hydroxypropanesulfonate contains not only active halogen atoms and hydroxyl groups, but also hydrophilic sulfonate groups. It is an important functional monomer in the synthetic polymer industry, and can also be used as an organic chemical intermediate for preparing surfactants, modified starch, drilling fluid loss control materials and cosmetics industry. Although it is a functional monomer with a wide range of uses, there are no mature industrial products in the domestic market, and the product yield and process need to be improved and improved. Through scientific research and technical research, our company has improved the production process of sodium propyl sulfonate, and obtained 3- chloro -2- hydroxypropyl sulfonate with high yield and high quality.