The utility model provides a dispersion and circulation system for ultrasonic solid-liquid slurry, which comprises a material tank, an ultrasonic reaction kettle group, and a feeding pump device. The discharge port of the material tank is connected to the feed port of the ultrasonic reaction kettle group through a pipeline, and the discharge port of the ultrasonic reaction kettle group is connected to the feed port of the material tank through a second pipeline; The material tank is equipped with a stirring device inside, which is used to stir the solid-liquid slurry; The ultrasonic reactor group is equipped with an ultrasonic interface; The feeding pump device is installed on the circulation path of the dispersed circulation system to provide circulation power for solid-liquid slurry. The present utility model achieves particle refinement of alumina dispersion products through the stirring of solid-liquid slurry by a material tank and ultrasound provided by an ultrasonic reaction kettle group. The dispersion degree of the dispersed product slurry is significantly improved, the process cycle is significantly shortened, energy consumption is significantly reduced, and the instrument volume of the dispersion circulation system is greatly reduced.