▎ 摘　　要

NOVELTY - Method for preparing heat-conducting insulating cellulose film involves adding oxidized graphene,metal salt and de-ionized water, and ultrasonically dispersing, under vigorous stirring, adding strong alkali and heated to refluxing,centrifugation, freezing and drying, calcining at high temperature to obtain heat-conducting filler. The cellulose nanometre fiber and the heat conducting filler are mixed to obtain the cellulose nano fiber/heat conducting filler mixture. The cellulose nanofiber/heat conducting filler mixture inde-ionized water ultrasonic dispersion, to obtain cellulose nanometre fibre/heat conductive fillermixed liquid. The cellulose nanofiber/heatconductive filler mixed dispersion by vacuum-assisted self-assembly technology to prepare heat-conducting insulating composite film. The heat-conducting insulating composite film throughmechanical moulding, drying to obtain heat-conducting insulating cellulose composite film. USE - Method for preparing heat-conducting insulating cellulose film. ADVANTAGE - The method enables to prepare heat-conducting insulating cellulose film has high heat conduction coefficient and high thermal conductivity and has simple preparation technique.