▎ 摘　　要

NOVELTY - Preparing graphene nanofiber or nanotube, comprises ultrasonically dispersing natural graphite in a solvent to obtain graphene oxide dispersion, adding solute into the dispersion to obtain mixed solution, electrically spinning, pre-oxidizing, carbonizing and treating with ammonia gas, where the solvent is organic solvent or water, the solute is polyacrylonitrile when the solvent is organic solvent, and the solute is water-soluble polymeric substance when the solvent is water. USE - The method is useful for preparing graphene nanofiber or nanotube (claimed). ADVANTAGE - The method is simple.