▎ 摘　　要

NOVELTY - The utility model relates to material preparation field, claims a preparation device of nano material of graphene, carbon nano tube, solves the problem that the traditional preparation method has low production efficiency; the safety is not high; the technical solution comprises a chemical vapour deposition device; the outer side of the discharging pipe of the chemical vapour deposition device is sleeved with a cooling mechanism; the pipe opening of the discharging pipe is connected with a collecting device for collecting the discharging pipe of the discharging pipe; the periphery of the collecting device and the discharging pipe is provided with an open exhaust device; the internal air pressure of the exhaust device is lower than the external air pressure; the hydrogen is properly processed; under the condition of not affecting the preparation efficiency, it effectively reduces the possibility of hydrogen explosion; the safety is higher.