Graphene is a kind of crystal carbon nanomaterial with two-dimensional structure which has excellent electrical conductivity

mechanical properties. It can be widely applied in nano electronic devices

composite materials and other fields. The preparing methods has attracted much attention in recent years. This paper mainly introduces the chemical preparation methods

which includes oxidation reduction method

epitaxial growth method

chemical vapor deposition method and other methods. At the same time

this paper desicribes the advantages and disadvantages of each methods and stresses the influences on the structure and property of the graphene prepared by the reduction method. This kind of graphene has promising applications.