Bio-based TPV composite material for vehicles and preparation method thereof

The invention belongs to the technical field of TPV composite materials, and relates to a bio-based TPV composite material for vehicles and a preparation method thereof. The bio-based PP, the bio-based EPDM, the biomass filler, the color master particles and the biological soybean oil are fully plasticized in a screw rod, then the plasticized materials are combined with auxiliaries such as a composite vulcanizing agent and a composite stabilizer, and extrusion granulation is performed to obtain the low-pressure-change bio-based TPV composite material for the vehicle, and the low-pressure-change bio-based TPV composite material has relatively high biomass content and excellent aging resistance; a vulcanization system compounded by tert-butyl peroxyacetate and di-tert-butyl peroxide is adopted, the tert-butyl peroxyacetate is subjected to a vulcanization reaction in one step, and then the di-tert-butyl peroxide crosslinks the residual incompletely vulcanized part together through a molecular chain of the di-ter