▎ 摘　　要

NOVELTY - A graphene fiber is prepared by producing graphene oxide solution having a concentration of 2-20 mg/l, filling obtained solution is a pipeline reactor at a depth of 0.1-10 mm, sealing the pipeline reactor, heating at 100-300 degrees C for 1-6 hours, drying obtained graphene fiber at 20-60 degrees C, and subjecting dried product to dehydration shrinking reaction. USE - Method of preparing a graphene fiber. ADVANTAGE - The method is simple and easy, utilizes low cost raw materials, and prepares fiber having uniformed structure and excellent mechanical property.