Preparation of titanium metal by electrolytic process in molten salt has been the crucial process for the development of titanium industry to explore and seek breakthroughs. In recent years, the molten salt electrolysis process has attracted great attention of resrarchers worldwide. In this work, the development and research progress of electrolytic processes in molten salt are analyzed including FFC Cambridge process, OS process and USTB process, and the differences of them related to the process, mechanism and characteristics are discussed, on the basis of which their advantages and disadvantages are compared. Finally, the problems in industrialization of the electrolytic processes are also discussed.