Wu Ling Chih is a traditional Chinese medicine which first came into use in the ancient. The research work contains the studies of prescription and efficacy of medicine on Wu Ling Chih. Wu Ling Chih was first reported in Kai-Pao-Pentsao (開 寶本草) and then in the pentsa (本草) of subsequent dynasties.It was believed to have antiplatelet aggregation and analgesic effects. To sum up, it was used in different prescription for clinical application. This study has provided useful information to the effect that Wu Ling Chih is animal feces but it still has something surplus value.