Device for fully screening crushed chemical materials

The utility model discloses a device for fully screening crushed chemical materials, which comprises a bottom plate, and one side of the top surface of the bottom plate is fixedly connected with a support block. Through operation of a motor, under the arrangement of a second gear, a first gear, a belt wheel and a belt, a reel rotates, chemical materials are conveyed into a third round box, meanwhile, a sleeve rotates synchronously, and when a first through hole is matched with a second through hole, the materials fall into a second round box; at the moment, a U-shaped rod and a stirring rod are driven to rotate through a sleeve, so that a crushing roller arranged on the U-shaped rod rolls, materials in a second round box are ground and crushed, the ground and crushed materials are stirred through the stirring rod, and crushed small particles fall into a first round box; and through intermittent meshing of the half gear and the gear ring, the first round box swings, then the materials in the first round box sh