Tian gui was first found in Shanggu Tianzhen Lun of Suwen. Since then, with the doctors had added to it, the theory of tian gui was being perfected. However, due to the various opinions of various people, the connotation of the theory of tian gui was also becoming more and more obscure. Through the analysis of the literatures of the ancient doctors in ancient times and comprehensive modern medicine research on theory of tian gui, this paper elaborated on the origin, physiologic and pathology and modern research progress of tian gui, which extended the research scope of theory of tian gui and g...