With the Populus euphratica Oliv leaves as experimental materials,the extraction technology of total flavonoids was optimized and the anti-lipoperoxidation property of the flavonoids was studied.As indicated by the results,the optimum technological conditions of ultrasonic extraction was:extracting agent of 75% ethanol,ultrasonic time of 25 min,and solid-liquid ratio of 1∶25,the extraction ratio of total flavonoids reached 11.20%.Ethanol extractions from Populus euphratica Oliv leaves performed low anti-lip...