▎ 摘　　要

NOVELTY - The preparation method of water-based lubricant of graphene quantum dot involves dissolving butenedioic acid in water, adding linear primary amine to form mixed carbon source solution, transferring mixed carbon source solution to high pressure reactor, heating and freeze-drying to obtain functionalized graphene quantum dot, mixing functionalized graphene quantum dot, oily agent and water and stirring. USE - The method is useful preparing water-based lubricant of graphene quantum dot (claimed). ADVANTAGE - The method enables preparation of water-based lubricant of graphene quantum dot with excellent surface activity and stability.