The invention discloses an environment-friendly weather-resistant wood-plastic floor tile and a preparation method thereof, and relates to the field of floor tiles. The environment-friendly weather-resistant wood-plastic floor tile comprises the following raw materials of, by parts, 20-30 parts of polyvinyl chloride, 35-50 parts of waste plastic, 30-40 parts of scrap cardboard, 15-25 parts of bamboo powder, 8-15 parts of glass fiber, 8-15 parts of attapulgite, 10-20 parts of light calcium carbonate, 3-6 parts of tourmaline powder, 5-10 parts of nano titanium dioxide, 2-4 parts of methyl methacrylate, 1.8-3.2 parts of silane coupling agents and 2.4-3.5 parts of antibacterial agents. The environment-friendly weather-resistant wood-plastic floor tile is stable in properties, has good corrosion resistance, pressure resistance and weather resistance. The environment-friendly weather-resistant wood-plastic floor tile adopts the waste plastics and the scrap cardboard as the main raw materials, the problem of environmental pollution caused by the waste plastics and the scrap cardboard is solved, meanwhile, waste resources are rationally recycled, energy consumption is saved, and environmental protection is realized.