[Objective] The purpose was to confirm the optimum parameters for the extraction process of flavonoids from dandelions.[Method] With the giant dandelions in Qinghai Province as tested material,its flavonoids content was extracted by ethanol extracting method,the effects of different ethanol concn.,the ratio of solid to liquid,the extracting temperature and times on the extraction rate of flavonoids from dandelions were studied through single factor test and the parameters for the extraction process of flavo...