The invention discloses a polycarbonate-containing styrene thermoplastic elastomer composite material, and a preparation method of a formed body made of the composite material. The polycarbonate-containing styrene thermoplastic elastomer composite material comprises styrene thermoplastic elastomer, polycarbonate resin, a compatibilizer, white mineral oil, a photothermal stabilizer, a lubricant and an inorganic filler. The preparation method of the formed body comprises the following steps: premixing the above components in a high speed mixer for 3-10min, allowing the obtained premix to go through a double screw extruder, carrying out melt extrusion at 150-280DEG C, carrying out cooling granulation, and carrying out injection molding to obtain the formed body. The polycarbonate-containing styrene thermoplastic elastomer composite material and the formed body have the advantages of light weight, high wear resistance, high slip resistance, stable dimension, low temperature resistance, and excellent tensile strength and tear strength.