▎ 摘　　要

NOVELTY - Preparing a graphene thermal conductive film comprises soaking the graphite paper in an acidic intercalation solution for intercalation treatment to obtain intercalated graphite paper, soaking the intercalated graphite paper in an acidic oxidizing solution for oxidation treatment to obtain expanded graphene paper, graphitizing the expanded graphene paper and calendering. USE - The method is useful for preparing a graphene thermal conductive film. ADVANTAGE - The method: is simple; ensures high thickness, high heat flux and excellent mechanical strength. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) graphene thermal conductive film prepared by the above mentioned method; and (2) electronic device comprising a graphene thermal conductive film prepared by method.