▎ 摘　　要

NOVELTY - Method for preparing carbon material involves (a) applying a voltage to a conductive medium in an oxygen-free environment comprising a carbon source and a catalyst, and applying voltage to form a conductivity path to obtain a carbon material, (b) obtaining the carbon material in a liquid-phase conductive system, and (c) obtaining carbon material on a surface substrate when the conductivity medium is a solid substrate or a liquid phase conductivity system. USE - Preparation method of carbon material used in micro-circuit, interface enhancement, light weight industry and field. ADVANTAGE - The preparation method is simple, convenient for industrial application. The method uses conductive path preparation the carbon material, preparation simple flow, small energy consumption, low cost, low requirement of the device, it can realize the preparation material at normal temperature. By adjusting the current, voltage resistor time, can obtain different kinds of carbon material comprising a graphene, carbon nano tube or carbon fiber. DESCRIPTION OF DRAWING(S) - The drawing shows an electroscope of carbon material obtained in Example 1 carbon fiber surface.