▎ 摘　　要

NOVELTY - Modified polyol comprises polyol matrix and micro-nanolignin cellulose dispersed in a matrix selected from the group consisting of polyether polyols and/or polyester polyols. USE - Modified polyol used in automobiles, airplanes, fan blades, doors and windows, container floors, pipes, sleepers, and fitness equipment (claimed). ADVANTAGE - The modified polyol enhancing and toughening the polyurethane material. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing a modified polyol, which involves adding a micro-nano lignocellulose dispersion to a polyol and mixing uniformly to obtain a polyol mixtur, removing dispersion reagent in the polyol mixture to obtain a modified polyol; and (2) a modified polyurethane material, which involves modified polyol, where modified polyurethane material is dispersed with micro-nano lignocellulose, preferably content of the micro-nano lignocellulose is 0.01-1 wt.%.