Graphene powder is a hexagonal two-dimensional carbon nano material with honeycomb lattice, which is separated from graphite by micromechanical stripping. It is a two-dimensional crystal composed of a layer of carbon atoms. Compared with other organic polymer materials, graphene has unique atomic structure and mechanical properties. Its bonds link with other carbon atoms to form a hexagonal honeycomb layered structure. The pz orbital of each carbon atom perpendicular to the layer plane can form polyatomic large bonds throughout the layer, so it has excellent electrical conductivity and optical properties. The theoretical Young's modulus of graphene is 1.0 TPa, and the inherent tensile strength is 130 Gpa, which is one of the materials with very high strength known. At the same time, it has good toughness and can bend, and is known as the "king of new materials" and "black gold".