The invention discloses a modified polypropylene film, made from, by weight, 80-100 parts of polypropylene masterbatch, 8-12 parts of metallocene ethylene-hexene copolymer, 3-6 parts of maleic anhydride grafted polypropylene, 0.1-0.5 part of polyvinyl methyl ether, 1-3 parts of polystyrenesulfonate, 0.3-1.5 parts of a defoaming agent, 0.4-1 parts of a coupling agent, 2-5 parts of a slipping agent, 1-3 parts of nano titanium dioxide, 1-2 parts of nano tin antimony oxide powder, 0.5-1.5 parts of organic montmorillonite, 1-1.5 parts of a dispersant, 0.5-1.5 parts of an antioxidant, 2-5 parts of glass beads, 1-2 parts of a toughener, and 1-2 parts of graphene. The metallocene ethylene-hexene copolymer, the maleic anhydride grafted polypropylene, the polyvinyl methyl ether and polystyrenesulfonate are added to polypropylene as a main material to carry out modification, gas barrier property, hydrophilicity, stain resistance, toughness and impact resistance of the film are improved, and the film also has good properties of static resistance, antibacterial property, weatherability, stability, thermal insulation, ultraviolet resistance, self-cleaning resistance and aging resistance.