Abstract: Kiln-process phosphoric acid technology is a new technology self-developed in China in recent years.It is a new production method to produce high purity and high concentration phosphoric acid by directly using medium and low grade phosphorite.Origin and basic principle of kiln-process phosphoric acid production technology were briefly reviewed and key points in the technology were pointed out.General research survey and development history of kiln-process phosphoric acid production technology at home and abroad were introduced.At last,in allusion to the existing problems,research direction and development suggestions for kiln-process phosphoric acid were proposed.