The total flavonoids and polysaccharides of Cymbopogon citratus( DC.) Stapf were analyzed by UV spectrophotometry. The total flavonoids of Cymbopogon citratus( DC.) Stapf were 5. 14 mg/g( before essential oil extraction) and 1. 50 mg/g( after essential oil extraction),respectively. The polysaccharides of Cymbopogon citratus( DC.) Stapf showed little difference before and after essential oil extraction,those were 7. 93 % and 7. 26 %,respectively. It was concluded that Cymbopogon citratus( DC.) Stapf with tho...