▎ 摘　　要

NOVELTY - The method involves forming the carbon nanotube fibers with a graphene sheet layer and pulling the fiber out of a graphene solution tank by a drafting roll set outside the tank. The carbon nanotube fibers with a graphene sheet layer is dried, by using a drying roller. The fibers with graphene sheets is wound and collected, after drying, by using a winding roller. The collected bundled graphene sheet-containing carbon nanotube fibers are bundled and twisted to obtain the graphene-carbon nanotube composite fibers. USE - Preparation method of graphene-carbon nanotube composite fiber. ADVANTAGE - The tensile strength of graphene-based carbon nanotube fibers are effectively increased. The interface binding force between graphene and carbon nanotubes is enhanced, in order to improve the electrical conductivity and electromagnetic shielding performance of the product. The graphene-based carbon nanotube composite fiber can have good flexibility.