▎ 摘　　要

NOVELTY - Preparing light large-scale graphene electromagnetic shielding film comprises using graphene structure composed of 1-4 layers of graphene sheets, between the graphene sheet and the sheet is provided with a hole, where the average section size of the hole is 10 nm-400 nm, the porosity is more than 70%, and the defect of the graphene sheets is very few, and the ID/IG is less than 0.01. USE - The method is useful for preparing light large size graphene electromagnetic shielding film, which is useful in electronic device. The graphene film is used in aerospace field. ADVANTAGE - The light large size graphene electromagnetic shielding film has excellent electromagnetic shielding performance, and can be mass produced in a simple and is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a light large size graphene electromagnetic shielding film and preparation method.