Natural fiber composite material and preparation method thereof

The invention relates to a natural fiber composite material and a preparation method thereof, the natural fiber composite material comprises a matrix formed by natural fibers and a filler, and the filler is filled in the matrix and a lumen structure of the natural fibers; the filler comprises the following raw materials: thermosetting resin, a functional component and a curing agent, the number of functional groups of the thermosetting resin is 2-3, the degree of polymerization is 100-200, and the relative molecular weight is 5000-40000; the functional component is silicon carbide micro powder; or the functional component comprises silicon carbide micro powder and one of an inorganic filler or an antioxidant; or the functional components comprise a hydrophobic filler, an inorganic filler and an antioxidant. The functional components and the thermosetting resin are matched, so that the filler is effectively filled into the tubular cavity structure of the natural fiber, the microstructure of the natural fiber i