▎ 摘　　要

NOVELTY - Preparation of reduced graphene oxide (rGO) comprises pretreating GO raw material by drying, grinding and sieving, placing in closed heat treatment environment containing air or inert gas, and annealing at 175-250 degrees C. USE - The method is for preparation of reduced graphene oxide for preparing graphene thermally conductive film (claimed). ADVANTAGE - The conductive film has high thermal conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of a graphene thermally conductive film comprising blending rGO and GO to obtain slurry, coating substrate, drying to obtain GO film, and thermally treating.