Multilayer natural fiber sheet and thermoplastic plastic composite material, and preparation method thereof

The invention discloses a multilayer natural fiber sheet and thermoplastic plastic composite material, and a preparation method thereof. The multilayer natural fiber sheet and thermoplastic plastic composite material is mainly formed by stacking and laminating natural fiber sheets and thermoplastic plastics, wherein the natural fiber sheets are made by mixing about 10 to 40 percent of natural fibers and about 2 to 5 percent of dispersing agents in percentage by volume, and the remaining are the thermoplastic plastics. The natural fibers are cut short, and after being blended, the dispersing agents and the natural fibers are added into distilled pure water and are ultrasonically dispersed to obtain suspension liquid; the water and the dispersing agents are filtered, and then the suspension liquid is dried to obtain the natural fiber sheets; thermoplastic plastic particles are pressed into plastic sheets, and the natural fiber sheets and the plastic sheets are stacked into a multilayer material which is placed