Impact-resistant ABS resin and preparation method thereof

The invention discloses impact-resistant ABS (Acrylonitrile Butadiene Styrene) resin and a preparation method thereof. The impact-resistant ABS resin comprises ABS resin, a nano material, an antioxidant, a dispersing agent and an initiator, wherein the nanometer material is prepared from boron dipyrromethene and a modified MXene nanometer sheet; the antioxidant is an antioxidant 1790, and the proportion of the antioxidant 1790 is 0.15 to 0.25 percent; the dispersing agent is ethylene bis stearamide, and the proportion of the ethylene bis stearamide is 1.3 to 3.5 percent; the initiator is cumyl hydroperoxide, and the content of the cumyl hydroperoxide is 1.2-3.1%; the proportion of the ABS resin is 92.2 to 98.6 percent; the ratio of the nanomaterial is 4.5-7.1%, titanium atoms on the surface of the MXene nanosheet rapidly react with oxygen and/or hydroxyl radicals to generate TiO2, which is helpful for promoting the catalytic action of transfer of F atoms in a gas phase, and the radicals are fixed to generate