The invention discloses an ultrasonic lactagogue method. An ultrasonic lactagogue physiotherapy instrument is adopted to conduct a lactagogue care on a breastfeeding woman, the method particularly comprises the following steps that, a, gel is applied to the positions, corresponding to lactiferous ducts and lobules of mammary glands, of skin surfaces; b, the flat surface of a probe of the ultrasonic lactagogue physiotherapy instrument is placed on the skin applied with the gel, the probe is moved back and forth in the lactiferous duct direction, or the probe is circularly moved clockwise or anticlockwise, covering the areas of the lobules of the mammary glands, to conduct the ultrasonic lactagogue care. According to ultrasonic massage equipment, massage is conducted for specific meridian points and specific areas of breasts, according to the constitution of a puerpera, a therapeutic scheme is fine adjusted, the problems of physiologic engorgement and lobule focal nodular hyperplasia are quickly and painlessly solved, hand injuries of a massagist are reduced, the service year is prolonged, the physiologic engorgement is solved quickly for once, and the equipment is safe and without side effects.