The invention relates to a high-light spray-free acrylonitrile-acrylate rubber-styrene terpolymer (ASA)/polymethyl methacrylate (PMMA) air-inlet grille special composite material and a preparation method thereof. The composite material consists of the following components in parts by weight: 20-40 parts of acrylonitrile-styrene (AS) resin, 35-45 parts of ASA high rubber powder, 35-45 parts of PMMAresin, 2-4 parts of modified metal powder, 0.5-1 part of an antioxidant and 1-2 parts of a lubricating agent. The composite material has the advantages that surface modification is carried out on themetal powder, so that the compatibility between the metal powder and the resin is improved, the overall fluidity of the material is improved, and flow marks formed in a material injection molding process can be effectively avoided while the comprehensive performance of the material is improved. According to the prepared high-light spray-free ASA/PMMA air-inlet grille special composite material, the excellent mechanical property, chemical oil resistance, weather resistance and processability of the ASA and PMMA materials are achieved, and the metallic texture is also achieved. Paint spraying treatment is not needed, so that the manufacturing efficiency of the automobile air-inlet grille is greatly improved, and the manufacturing cost is greatly reduced at the same time, so that the application prospect is very wide, and the composite material has a good economic value.