Abstract: The research in solvent extraction purification technology for wet-process phosphoric acid is generally acknowle- dged as an important subject in the phosphorus chemical industry.China also began its study from 1970s—1980s，but most researches remained in the laboratory research stage.The industrialization progress，including overview of technology research advances，process flow，characteristics，product quality，and cost estimates etc.，of solvent extraction purification technology independently developed by China itself were introduced，so as to provide a reference for related enterprises to select technical solutions.

Key words: purified phosphoric acid, wet process, engineering, solvent extraction process