Asphalt concrete used for highway engineering and preparation method of asphalt concrete

The invention discloses asphalt concrete used for highway engineering and a preparation method of asphalt concrete. The asphalt concrete is prepared from the following raw materials, in parts by weight: 70-100 parts of aggregate, 3-8 parts of tailings powder, 3-6 parts of polymer resin, 3-10 parts of asphalt, and 0.1-0.5 part of a coupling agent. According to the asphalt concrete used for the highway engineering prepared by the method, the tailings powder is added, so that wear resistance of pavements is increased, and service life of the pavements is prolonged; polyvinyl alcohol grafted acrylic acid and polyhydroxybutyrate or polyamide resin are selected as a modifying agent of the asphalt, so that the adhesive capacity of the asphalt to coarse aggregate and medium aggregate is enhanced,and the adhesion thickness is uniform; and when the asphalt concrete prepared by the method is used for paving roads, the pavements have high strength, strong wear resistance, freeze thawing resistance, and long service life.