▎ 摘　　要

NOVELTY - A graphene electrothermal film comprises a metal substrate and a graphene conductive film coating liquid, where the metal substrate is first washed with deionized water, dried, and the metal substrate is second washed with ethanol, air-dried, and the metal substrate is third washed with ionized water, dried and the graphene conductive film coating liquid is applied to the metal substrate to be cured and dried to obtain a graphene electrothermal film, and the graphene conductive film coating liquid comprises 180-200 pts. wt. graphene, 50-80 pts. wt. auxiliary solvent and 40-70 pts. wt. mixed resin. USE - Graphene electrothermal film for use in energy batteries field (claimed). ADVANTAGE - The graphene electrothermal film has long service life, and can be prepared in simple, easy and cost effective manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing a graphene electrothermal film, which involves treating a metal substrate, first time washing the metal substrate with deionized water, and drying, second time washing the metal substrate with ethanol, air-drying, and third time washing the metal substrate with ionized water, drying, and adding auxiliary solvent to graphene, stirring at constant speed for 30 minutes, and ultrasonically dispersing for 50 minutes to obtain a first preparation liquid, and adding the mixed resin to the first preparation liquid, and stirring the mixture in a high-speed mixer for 40-60 minutes to obtain a second preparation liquid, and placing the second preparation liquid in an environment of 80 degrees C, and performing chemical vapor deposition to obtain a graphene conductive film coating liquid, and applying the graphene conductive film coating liquid to the treated metal substrate, solidifying and drying to obtain the finished product (2) use of a graphene electrothermal film for energy batteries.