▎ 摘　　要

NOVELTY - The preparation method of composite material involves adding acid to graphene oxide aqueous solution and then mixing, adjusting pH value to less than 5, adding octadecylamine and ethanol solution to the mixture and then reacting at 25-100 degrees C for 2-72 hours, washing using ethanol and then drying at 40-80 degrees C for 12-48 hours, adding polyolefin elastomer to the mixture, and stirring. USE - The method is useful for preparation of composite material. ADVANTAGE - The method enables preparation of composite material with excellent compatibility, mechanical properties and tensile strength. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for composite material prepared by the method.