▎ 摘　　要

NOVELTY - Preparation of graphene composite film involves submerging a substrate affixed with graphene film in poly(diallyldimethylammonium chloride) salt solution, immersing, removing the resultant film, rinsing with water, submerging the graphene film adsorbed with poly(diallyldimethylammonium chloride) molecules in an oxidation graphene aqueous solution, immersing, rinsing with water, performing blow-drying process, and reducing at 300-800 degrees C under protective inert atmosphere. USE - Preparation of graphene composite film (claimed). ADVANTAGE - The method provides graphene composite film having high light transmittance and ultra-low resistance temperature coefficient.