The invention discloses modified asphalt concrete for purifying air, which comprises traditional asphalt concrete and tourmaline, wherein the use quantity of the tourmaline is 10-40% of the mass of asphalt in the traditional asphalt concrete, and the tourmaline is tourmaline powder and/or tourmaline anion powder. The modified asphalt concrete has remarkable air purifying effect and can effectively purify NOX (Nitrogen Oxide and Nitrogen Dioxide), HC (Hydrocarbon Compounds), CO (Carbon Monoxide) and other harmful gases exhausted by automobiles. Meanwhile, the modified asphalt concrete has certain effect of absorbing greenhouse gas CO2 (Carbon Dioxide) and can obviously improve road surrounding environment. The modified asphalt concrete has the advantages of excellent pavement performance, simple construction technology and nontoxic and harmless raw materials and has great social benefits in the aspects of improving the application quality of asphalt pavement and protecting the environment.