▎ 摘　　要

NOVELTY - The plate has a substrate (1) formed with a filter hole. A graphene filter unit (2) covers a filter hole. The filtering unit is provided with a filtering part and a connecting part. The filtering part is located at an inner side of the connecting part. The raw material for preparing graphene filter unit comprises graphene component, forming polymer and water-soluble pore-forming agent. The graphene component is provided with modified product of graphene oxide. The forming polymer is provided with polydopamine, chitosan, low density polyethylene, linear low density polyethylene, medium density polyethylene and high density polyethylene. The water-soluble pore-forming agent is polyethylene glycol and/or polyvinylpyrrolidone. USE - Graphene filter plate. ADVANTAGE - The filter plate has longer service life and can reduce the maintenance cost. The graphene filter unit can be more closely adhered to the inner wall of the filter hole, forming interference fit, and increasing the pressure of inner wall and static friction force, so as to make up the adhesion caused by swelling, the graphene unit even if swelling is not easy to fall off. The structure of refine filter unit graphene provided with a connecting part and a filter part, the connecting part is used for fixing the filter part on the substrate, at the same time, reduces the thickness of filter part. The fluid can pass through the filter portion more quickly by reverse washing, The filter plate easier to remove the accumulated impurities after filtering. The filter plate is convenient to maintain. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparing method of the graphene filter plate. DESCRIPTION OF DRAWING(S) - The drawing shows an isometric view of the graphene filter plate. 1Substrate 2Graphene filter unit