Efficient white corundum fine powder screening device

The efficient white corundum fine powder screening device comprises a material collecting box, a bottom plate and a screen mesh, a frame plate is fixed to the rear side of the upper end face of the bottom plate, a rotating cylinder is rotationally installed at the upper end of the inner side of the frame plate through a rotating shaft, a side groove is formed in the middle of the outer side of the rotating cylinder, and connecting rods are distributed in the side groove in an annular array mode; the screen is connected into the side groove in a sleeved mode and attached to the connecting rod, a fixing plate is arranged in the middle of an opening in the front end of the rotary drum, the material collecting box is located on the lower side of the rotary drum, the two ends of the two sides of the material collecting box are fixed to the bottom plate through supporting legs, and a discharging groove is formed in the lower end face of the material collecting box. And a frame is fixed to the lower side of the open