[Objective] The aim was to study the optimum extraction process of general flavone from Radix Flemingia Philippinensis with ultrasonic wave method.[Methods]With the extraction rate of flavonoids as the evaluation index,the extraction process was optimized with single factor and orthogonal test.[Results] The optimum extraction process of general flavone from Radix Flemingia Philippinensis with ultrasonic wave method was as follows: ethanol concentration of 80%,ultrasonic time of 25 min,solid-liquid ratio of ...