▎ 摘　　要

NOVELTY - The preparation of biomass polymer material-based photothermal conversion superhydrophobic film, involves (S1) adding biomass polymer material to deionized water, adjusting pH, and heating with stirring in water bath to dissolve, (S2) adding plasticizer to biomass polymer material solution and stirring in water bath, adding photothermal conversion filler and stirring in water bath, and pouring into film-forming plate for drying, introducing inorganic nanoparticles into the surface of obtained film to construct rough structure, and introducing low surface energy substances to reduce surface energy of film, and drying. USE - Preparation of biomass polymer material-based photothermal conversion superhydrophobic film (claimed). used for medical dressing, food packaging and building coating. ADVANTAGE - The method enables preparing biomass polymer material using economical and easily available raw materials, and the prepared biomass polymer material-based photothermal conversion superhydrophobic film has excellent photothermal conversion and superhydrophobic self-cleaning effect, and is renewable and biodegradable.