Flavonids is a kind of secondary metabolites during the growth of plants, and flavonids have lots of pharmacological actions as one of the main active moiety of medicinal plants. Oxytropis glabra DC. is a kind of medicinal plants on steppe. And it is widespread and resourceful.For effectively using the flavonids of Oxytropis glabra DC.,total flavonids was obtained from Oxytropis glabra DC. by means of alcohol and determined by spectrophotometry. Using one-factor experimental research the effect of ethanol c...