▎ 摘　　要

NOVELTY - The device has a preparation box (1) whose front surface and an inner wall of a rear surface are fixedly connected with an electric appliance main body (2). A top surface of the preparation box is formed with a square groove. A top side of the square groove is provided with openings. An inner side of a bottom surface of a top surface is fixed with a precise rolling transmission mechanism (3). The precise rolling conveying mechanism is fixed on left and right sides of the electric appliance body. The preparation box and a heating carbonizing graphitized laser mechanism. A discharging roller (31) is rotatably connected to the front and rear surfaces of the prepared box and the inner walls of the back surface. The discharge roller is arranged on a left side of an electric device main body. USE - Device for preparing graphene film by laser grading carbonization polyimide film in electronic device, such as battery, catalytic, sterilizing, separating and filtering and sensing. ADVANTAGE - The device for preparing graphene film by laser grading carbonization polyimide by laser power selection and laser action time control, reduces the poly-imide carbonization process in the occurrence of the film damage to solve the problem set forth in the background technology. The device reduces the power range of the laser, the power of the first-stage laser power is lower than the second stage laser, and the first and second-stage lasers are used for carbonizing and graphitizing at high temperature, and it is compacted by double-roller adjusting, then adjusting the thickness of the carbonized film by adjusting the roller distance to obtain the graphene film after compaction. The laser path, customized patterning graphene heat conducting film is adjusted according to the requirement of the client. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene film by using the device. DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic view of a device. 1Preparation box 2Electric appliance main body 3Precise rolling transmission mechanism 31Discharging roller 32Carbonization polyimide film 33Air expansion shaft 34Receiving roller 35Graphene film 36Correcting roller