▎ 摘　　要

NOVELTY - The method for preparing graphene dispersion, involves mixing graphene and deionized water to obtain graphene slurry, dispersing graphene by two-step ultrasonic method to obtain graphene dispersion, then adding modified substance to graphene dispersion and carrying out non-covalent modification to obtain modified graphene dispersion. USE - Method for preparing graphene dispersion. ADVANTAGE - The method enables simple and mass preparation of graphene dispersion with large area, small number of layers and few defects.