The invention discloses a high-hardness impact-resistant heat-insulation foamed plastic which comprises the following raw materials in parts by weight: 57-60 parts of ABS (acrylonitrile butadiene styrene) resin, 32-35 parts of EVA (ethylene vinyl acetate) resin, 22-26 parts of epoxy resin, 15-18 parts of phenolic resin, 3-3.6 parts of nylon 66 fibers, 2.5-2.9 parts of glass fibers, 2.4-2.7 parts of a silane coupling agent A-172, 15-18 parts of a foamer K, 3-6 parts of supercritical nitrogen gas, 9-12 parts of supercritical carbon dioxide, 3-6 parts of a polyethylene-octene copolymer elastomer (POE), 2.1-2.4 parts of diisononyl phthalate (DINP), 3.7-4 parts of epoxy octyl stearate, 7-10 parts of fumed silica, 25-28 parts of wollastonite powder, 17-21 parts of augite powder, 10-13 parts of mica powder, 0.7-2.1 parts of an antioxidant RD and 2.4-2.8 parts of an antioxidant 4010NA.