Strong impact load resistant asphalt mixture and preparation method thereof

The invention relates to a strong impact load resistant asphalt mixture and a preparation method thereof. The existing asphalt mixture cannot meet the use requirements of special sites such as airports in the aspect of strong impact load resistance at present. The asphalt mixture is prepared from SBS modified asphalt, nano SiO2, coarse-texture three-dimensional snowflake-shaped particles and aggregate, and the coarse-texture three-dimensional snowflake-shaped particles are particles obtained by taking polyurethane fibers/ultra-high molecular weight polyethylene composite fibers as raw materials in a 3D printing mode. The coarse-texture three-dimensional snowflake-shaped particles obtained in a 3D printing mode are doped into the asphalt mixture, the particles are distributed in the asphalt concrete in a three-dimensional mode, the particles of different sizes are compatible with one another, internal gap gradation and the three-dimensional form of gaps in the asphalt mixture can be effectively kept, and the p