▎ 摘　　要

NOVELTY - Preparing graphene fiber involves preparing graphene oxide spinning solution, attaching graphene oxide spinning solution to the core wire, and curing to obtain a graphene oxide composite fiber and reduced the graphene oxide composite fiber and removed the core wire to obtain a product. USE - Method for preparing graphene fiber used in industrial production and as raw material in electronic devices. ADVANTAGE - The method produces product which has hollow structure, good mechanical property and electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a device for preparing graphene oxide composite fiber, which comprises a heating unit, which comprising a casing with a spinning shaft and a heating mechanism connected with the casing, coaxial spinning mechanism has a first spinning chamber and a second spinning chamber sleeved outside the first spinning chamber, the first spinning chamber and the second spinning chamber are both connected with the spinning chamber and silk corridors are connected, where the core wire can enter the spinning shaft through the first spinning chamber, and the graphene oxide spinning solution enters the spinning shaft through the second spinning chamber and is attached to the core wire, the heating device can heat the core wire attached with the graphene oxide spinning solution to form the graphene oxide composite fiber.