In this paper a simple way to determine the content of saponins from Camellia oleifera with spectrophotometry was studied.Results showed that saponins can be well calculated according to their absorption at 551 nm under ultrasonic treatment of the sample in methanol for 50 min,and centrifugated in 4 ml 77 % H2SO4 for 15 min at 60 ℃.The experiment showed that the method established had less interference,good precision,simplicity,rapidity and can be well adopted for determination of a great deal of saponins f...