▎ 摘　　要

NOVELTY - The utility model belongs to the technical field of graphene, and claims a grading grinding device for preparing graphene, comprising a box body, the top part of the box body is equipped with a first motor, and the top part of the box body close to one side of the first motor is fixed with a feeding hopper; one side of the box body is equipped with a controller, and the inner part of the box body is fixed with three filter screens; the inner middle of the three filter screens are penetrated with a rotating shaft; one end of the rotating shaft extending to the outer part of the box body is connected with the first motor; and the outer wall of the rotating shaft close to the upper part of the three filter screens is fixed with a grinding rod; two ends of the bottom of the box body are provided with a cavity groove; the inner part of the cavity groove is fixed with a hydraulic cylinder; the utility model is matched with the second motor, the connecting shaft, the gear and the rack, so that the receiving frame can be quickly moved out or moved into the box body; at the same time, the material receiving frame is stable and reliable; it is not easy to move, and improves the use effect of the device.