▎ 摘　　要

NOVELTY - Preparing modified polyurethane comprises: (i) dispersing molten graphene in polyol, stirring and heating, drying under vacuum to obtain graphene complex polyol; (ii) mixing graphene complex polyol with diisocyanate, stirring under inert gas protection, heating the reaction to obtain polyurethane prepolymer; and (iii) mixing polyurethane prepolymer with chain extender, stirring, placing in mold, reacting to obtain modified polyurethane. USE - The method is useful for preparing modified polyurethane (claimed). ADVANTAGE - The method is simple, environmentally friendly and suitable for large scale production.