The invention provides a device for preparing a graphene conductive material. The device comprises a preparation workbench, a core material displacement control device is arranged on the preparation workbench, and a base material inner core is moved on a movement platform; the lower portion of the movement platform of the base material inner core is provided with a graphene solution brush roll andan isolation solution brush roll, the graphene solution brush roll and the isolation solution brush roll are arranged in parallel in order in the movement direction of the base material inner core, and when the base material inner core is moved, the graphene solution brush roll and the isolation solution brush roll are laminated; a heating and drying device is arranged at the upper portion of themovement platform, and the heating and drying device is acted on the base material inner core. The base material inner core is coated by employing the graphene solution brush roll and the isolation solution brush roll, the method for drying the graphene solution and the isolation solution by employing the heating and drying device is employed to form at least one graphene film and at least one isolation film at the outer portion of the base material inner core so as to rapidly and simply prepare the graphene conductive material.