▎ 摘　　要

NOVELTY - A preparation method of carbon coated fiber comprises preparing graphene derivative solution, coating graphene derivative solution in selected surface of quartz optical fiber composite quartz optical fiber, and forming graphene derivative layer; and microwave heating composite quartz optical fiber, cooling composite quartz optical fiber, and extruding. USE - Preparation method of carbon coated fiber. ADVANTAGE - The coated fiber has good conducting ability, good sealing effect, and effectively avoid corrosion. DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a preparation of carbon coated fiber.