▎ 摘　　要

NOVELTY - The method involves heating (S1) the furnace and maintaining the inside of gas atmosphere to bind the graphene powder in carbon nanotube. The catalyst metal is injected (S2) in the furnace. The hydrocarbon gas is injected (S3) into the furnace, and the carbon nanotube is grown on the catalyst metal adhered to the furnace inner wall. The graphene powder is injected (S4) into the furnace adhered to the furnace inner wall. The catalyst metal is selected from iron, molybdenum, nickel, and copper. USE - Manufacturing method of CNT-graphene composite material (claimed). ADVANTAGE - The thermal conductivity of composite material is improved effectively. The structure in which the graphene is combined about the longitudinal direction of carbon nanotube is formed for maximizing the protection against heat characteristic and electromagnetic wave shading feature to orthogonal direction, so that the thermal conduction along the length and width direction is improved effectively. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the manufacturing process of CNT-graphene composite material. (Drawing includes non-English language text) Step for heating furnace (S1) Step for injecting catalyst metal (S2) Step for injecting hydrocarbon gas (S3) Step for injecting graphene powder (S4)