Steel shot multi-stage screening heat treatment device

The utility model discloses a steel shot multi-stage screening heat treatment device which comprises a fixing base, a supporting frame is fixedly connected to the upper surface of the fixing base, a sliding groove is formed in the surface of the supporting frame, a lead screw is rotationally connected into the sliding groove, a motor is fixedly installed on the upper surface of the supporting frame, and the output shaft end of the motor is fixedly connected to one end of the lead screw. The steel shot cooling device comprises a cooling assembly, a sliding groove is formed in the cooling assembly, a sliding block is slidably connected to the interior of the sliding groove, a containing box is fixedly connected to one side of the sliding block, partition plates are arranged in the containing box at equal intervals in an array mode, and a material returning assembly is arranged on the surface of the containing box. The steel shots roll back and forth in the cooling tank under the action of gravity, heat of the s