▎ 摘　　要

NOVELTY - The preparation method of graphene aqueous solution involves (1) mixing graphene and a compound having a carboxyl group or a hydroxyl group according to mass ratio of 1:(1-10) to obtain solid mixture, (2) placing the solid mixture in a ball milling tank, and ball milling for 1-120 hours, (3) transferring the ball-milled product with deionized water, centrifuging the obtained product for 1-60 minutes, and taking the upper layer solution after completion, (4) dialyzing the obtained upper layer solution until the solution is neutral, and (5) ultrasonically processing the solution after dialysis for 1-48 hours. USE - Preparation method of graphene aqueous solution (claimed). ADVANTAGE - The method enables preparation of graphene aqueous solution with enhanced hydrophilic performance, strong oxidizing effect and excellent performance, by simple, easy and environmentally-friendly process.