[Objective] To study the optimal extraction technical parameters of flavonoids g1ycosides from HERBA LOBELIAE CHINENSIS.by ultrasonic-assisted extraction.[Method]With ethanol as the extracting solvent,the orthogonal design was employed to test the effects of four factors like ethanol concentration,extraction time,temperature and ratio of solid to liquid.[Result]The optimum extraction conditions were as follows:ethanol concentration of 50%,extraction duration of 35 min,extraction temperature of 50 ℃ and soli...