Preparation method of scratch-resistant lacquer-free ABS moulding composition with high glaze

The invention relates to a preparation method of a scratch-resistant lacquer-free ABS moulding composition with high glaze. The moulding composition comprises at least two acrylonitrile-butadiene-styrene graft copolymers with specific rubber phase grain diameter, rubber content and fusant flow characteristic, at least one of acrylonitrile-styrene copolymer with specific fusant flow characteristic, polymethylmethacrylate and polymethylmethacrylate copolymer, and black master batch made from hyperchromatic carbon black. The fusants with different flow characteristics are properly split and enriched by a moulding process such that the moulding article maintains the excellent shock-resistant toughness and has the scratch-resistant surface effect with high glaze without lacquering treatment.