The invention discloses an automotive polyvinyl chloride interior trimming panel and a preparation method thereof, belongs to the technical field of polyvinyl chloride panels, and solves the problemsthat the thickness, the hardness, the bending strength and the like of existing wood-plastic panels cannot meet the requirements of automotive interior trimming panels. The polyvinyl chloride interiortrimming panel is prepared from 80-100 parts of polyvinyl chloride SG8-type resin, 40-50 parts of heavy calcium carbonate, 10-20 parts of a wood-plastic reclaimed material, a foaming regulator as well as ingredients including a calcium-zinc stabilizer, an interior lubricant, an exterior lubricant, a foaming agent, wood flour and the like. The preparation method of the panel comprises steps as follows: the polyvinyl chloride SG8-type resin and the ingredients are put into a hot-mixing pot for hot-mixing, then the foaming regulator and calcium powder are put sequentially for hot-mixing, the wood-plastic reclaimed material is put finally, the mixture is put into a cold-mixing pot for cooling after hot-mixing, is sent to a mold for extrusion finally after being plasticized by seven sections of double screws of a barrel, is subjected to cooling press-fitting shaping by a shaping platform and is pulled out by a pulling machine for cutting forming, and a finished product is obtained. The invention is applicable to the automotive interior trimming panel.