This essay discusses the mechanisms of steroid-induced avasulat necrosis of the fcromal head from the aspects of both Chinese medicine and Western medicine by summarizing the relevant literatures. It introduces the pharmacology studies on Danshen and analyzes its efficacy and mechanism to treat SANFH, which is dredging the microcirculation, improving blood performance and exerting Estrogen effect. Also it summarizes the effect of Danshen coupling with other therapies to cure SANFH.