The invention relates to a stirring structure of a sand washing machine; the stirring structure comprises a wheel axle and a blade; the blade is provided with a strip-shaped groove, one side of the strip-shaped groove is provided with a plurality of arc-shaped grooves evenly distributed at intervals, and the arc-shaped grooves are located at the outer side of the blade when the blade rotates. The plurality of arc-shaped grooves are arranged at the outer side of the blade when the blade rotates, so that the extrusion force of the blade to sand bodies is increased, so as to improve the stirring effect.