Novel polyvinyl chloride composite material and preparation method thereof

The invention discloses a novel polyvinyl chloride composite material and a preparation method thereof, and belongs to the technical field of high polymer materials, the novel polyvinyl chloride composite material comprises the following raw materials by weight: 90-100 parts of polyvinyl chloride resin, 8-12 parts of chlorinated polyethylene, 65-70 parts of dioctyl phthalate, 8-12 parts of modified nitrile rubber, 10-20 parts of a flame retardant, and 1-4 parts of a barium-zinc heat stabilizer; the modified nitrile rubber is prepared by grafting nitrile rubber with methyl phenyl vinyl chlorosilane as a grafting monomer, styrene as a co-monomer and dicumyl peroxide as an initiator. The polyvinyl chloride resin is adopted as a main material, the modified nitrile rubber is added, the dispersity in a system is good, the modified nitrile rubber and the polyvinyl chloride resin are cooperated in performance, the low-temperature resistance of the polyvinyl chloride resin is improved, and the low-temperature brittle