▎ 摘　　要

NOVELTY - Preparing composite fiber involves coating surface of the fiber material with mixture of polypyrrole or polypyrrole and graphene oxide. The fiber material is immersed in catalytic metal aqueous solution and growing a columnar carbon nanotube on the surface of the fiber material by irradiated the fiber material with microwaves to obtain composite fiber. USE - Method for preparing composite fiber (claimed). ADVANTAGE - The method enables to prepare composite fiber, that has high rigidity, high tensile strength, excellent mechanical strength and has good electrical conductivity effect.