The invention belongs to the technical field of preparation processes of graphene materials and in particular relates to a method for preparing graphene by accelerating medium flow stripping through utilizing static electricity. The method comprises the following steps: mixing a laminar crystallized graphite material, sodium salt and water under the action of mechanical stirring and ultrasounds to obtain graphite slurry; spraying out the graphite slurry through a high-pressure atomizing nozzle provided with a point corona device, so as to form tiny mist liquid drops; meanwhile, carrying out corona treatment on mist liquid drop micro-particles; rapidly gathering negative charges on the surfaces of the graphite micro-particles; finally, splitting the tiny mist liquid drops into single graphite particles under the action of the static electricity; when the electrostatic repulsive force between the charges exceeds an inter-laminar gap of the graphite micro-particles and is further increased, forming expandable graphite particles and electrifying; furthermore, accelerating to strip the graphite into the graphene by utilizing a medium flow accelerated by an electrostatic accelerator. According to the method provided by the invention, an oxidization treatment process is avoided and the graphite is stripped into the single-layered graphene in a high-yield manner; compared with other graphene preparation processes, the single-layered graphene produced by the method has fewer defects and higher electric properties and mechanical properties.