Active portion were obtained from Er-xian decoction (EXD), bio-assayed with phannacological activities on the osteoblast and the osteoclast in vitro model. 22 compounds were obtained from the active portion. In order to investigate the pharmacological effect and principal mechanism of antiosteoporosis in EXD, several screening models including OVX as well as cell cultivation in vitro were used to evaluate their effectiveness. Our results clearly indicated the mechanism of action in EXD and active mass for a...