Rough flavonoids can be extracted from rosa laveigata michx(L.) with 70% alcohol,and its pure can be measured by spectrophotometryic methods.Then measuring its antioxidant property of flavonoid compound by the method of TBA with linoleic acid as substrate.It showed out: Flavonoid increment with deal along with mature degree but lower,the total flavonoids content in the dry weight of Rosa laevigata is 15.39%,the flavonoids content in rough flavonoids powers is 26.39% and the rough flavonoids powers content i...