[Objective] To optimize the extraction process of resveratrol from RHIZOMA ET RADIX POLYGONI CUSPIDATI using ultrasonic-assisted technology through orthogonal test.[Method] Effects of extraction temperature,extraction time and ultrasonic power on the extraction rate of resveratrol from RHIZOMA ET RADIX POLYGONI CUSPIDATI by using ultrasonic-assisted wave method.[Result] The optimum extraction process of resveratrol was as follows:extraction temperature of 80 ℃,extraction time of 45 min and ultrasonic power ...