Wood plastic composite and preparation method thereof

The invention discloses a wood plastic composite and a preparation method thereof. The wood plastic composite comprises the following raw materials according to parts by weight: 30-80 parts of modified wood fiber, 20-70 parts of plastic, 2-10 parts of compatilizer, 2-10 parts of lubricant, 0.2-1.0 part of antioxidant, 5-15 parts of filler and 2-10 parts of fire retardant. 'forestry three waste' wood wastes are prepared onto modified wood fibers with an explosion treatment method, wherein the modified wood fibers are mutually separated, and eh surface of the modified wood fibers is covered with lignin; then the modified wood fiber is compounded with plastic; and the product is extruded to form finished product material. According to the wood plastic composite, the technical problems of poor compatibility of wood fiber and thermoplastic plastics can be solved to realize the purpose of comprehensively utilizing the 'forestry three waste' wood and plastic, the wood can be omitted, and the additional value of the forest residue is increased. The wood plastic composite manufactured with the preparation method has high mechanical property, and strong tensile strength, bending strength and impact strength of composite material, and the industrial production of high-performance products, such as building engineering materials, can be realized.