The invention relates to a high-gloss, high-hardness and spraying-free ABS (acrylonitrile butadiene styrene) plastic modified material and a preparation method thereof. The high-gloss, high-hardness and spraying-free ABS plastic modified material comprises the following raw materials in parts by weight: 55-64 parts of ABS resin, 15-20 parts of AS (acrylonitrile styrene) resin, 15-25 parts of PMMA (polymethyl methacrylate) resin, 0.2-0.5 part of plasticizer, 0.2-0.5 part of lubricant, 1-2 parts of high color black, 0.2-0.4 part of antioxidant and 0.1-0.2 part of methyl silicone oil. The high-gloss, high-hardness and spraying-free ABS plastic modified material disclosed by the invention has very high hardness, the surface hardness can be above the H level, and the high-gloss, high-hardness and spraying-free ABS plastic modified material further has strong anti-scratch performance during the using process and is less prone to being scratched; the high-gloss, high-hardness and spraying-free ABS plastic modified material has very high gloss, high black and bright degree, stable quality, good using effects and good tensile strength, anti-impact strength and other performances, and housings of televisions, refrigerators and washing machines applying the high-gloss, high-hardness and spraying-free ABS plastic modified material have stronger anti-impact performance and long service life; and the preparation method disclosed by the invention has the advantages of simplicity in operation, few required equipment and low production cost.