The invention discloses a sound-insulation elastic plastic floor. The floor comprises a surface layer, an interface layer and a base layer, wherein the surface layer comprises, by weight, 80-90 parts of a polyvinyl chloride resin, 100-120 parts of calcium carbonate, 15-25 parts of dioctyl phthalate, 10-15 parts of a zinc-barium composite stabilizer, 1-5 parts of an epoxy resin, 1-5 parts of pentaerythritol and 0.5-2 parts of trioctyl ester; the interface layer comprises, by weight, 100-120 parts of the polyvinyl chloride resin, 20-30 parts of calcium carbonate, 50-60 parts of dioctyl phthalate, 0.5-3 parts of pentaerythritol, 0.5-2 parts of the trioctyl ester and 0.5-2 parts of an AC foaming agent; and the base layer comprises, by weight, 90-120 parts of the polyvinyl chloride resin, 60-70 parts of dioctyl phthalate, 3-8 parts of barium stearate, 2-6 parts of pentaerythritol, 1-3 parts of the trioctyl ester and 3-8 parts of acetyl citrate.