▎ 摘　　要

NOVELTY - Method for preparing a graphene coating solution involves (a) placing the organophosphorus compound in a water-soluble polyurethane solution, adjusting its viscosity to 4000-6500 cps, and pH to 2-5 to obtain a mixed solution, and (b) adding the graphene powder to the mixed solution of the organophosphorus compound and the water-soluble polyurethane solution, stirring evenly to form a graphene coating solution, where the graphene coating solution comprises 0.5-30 %mass graphene powder. USE - The method is used for preparing a graphene coating solution (claimed). ADVANTAGE - The method effectively solves problem of easy agglomeration of graphene, ensures the uniform dispersion of graphene, utilizes the excellent properties of graphene, is simple and cost-effective, and has high production efficiency.