The invention relates to a polypropylene-maleic anhydride grafted polypropylene-bacterial cellulose composite material. The composite material comprises the following components in percentage by weight: 85-94.5% of a polypropylene homopolymer, 5% of maleic anhydride grafted and 0.5-10% of bacterial cellulose. The polypropylene homopolymer, maleic anhydride grafted and bacterial cellulose are mixed by a double-screw extruder, so that compared with pure polypropylene, the prepared composite material has the advantages that the tensile strength, the impact strength and the tensile modulus are improved by about 16%, 25% and 22% respectively.