Large-flow aluminum oxide automatic sand cleaning and separating equipment and separating method thereof

The invention discloses large-flow aluminum oxide automatic sand cleaning and separating equipment. The equipment comprises a material distributing box and three sand removing boxes, the three sand removing boxes are evenly distributed on the periphery of the material distributing box and communicate with the material distributing box, and each sand removing box comprises a motor, a steel wire mesh, a material collecting hopper, a filtering device and a stirring device; the steel wire meshes are arranged in the sand removing boxes, and the stirring devices are arranged in the filtering devices. The invention further discloses a separating method of the large-flow aluminum oxide automatic sand cleaning and separating equipment. Aluminum oxide is filtered through the steel wire meshes and then collected into the filtering devices to be filtered again; the stirring devices stir aluminum oxide containing impurities into discharging pipes, then the aluminum oxide is discharged into full-automatic hardened material