The invention relates to high-strength steel and a galvanization method thereof, and belongs to the technical field of galvanization pretreatment process technologies. With the high-strength steel andthe galvanization method thereof, the problem that in the prior art, it is difficult to galvanize high-strength steel is solved, the phenomenon that plating is missing on some parts is avoided, the number of impurities carried into liquid zinc by steel bands is reduced, and the surface quality of galvanized sheets is improved. A layer of nanometer metal layer is electroplated on the surface of the high-strength steel, the nanometer metal layer is a nanometer nickel layer or a nanometer iron layer, and the extension strength of the high-strength steel is larger than or equal to 210 MPa; the thickness of the nanometer nickel layer ranges from 10 mg/m2 to 850 mg/m2; and the thickness of the nanometer iron layer ranges from 100 mg/m2 to 1, 500 mg/m2. The galvanization method of the high-strength steel comprises the steps of oil removal treatment, acid dipping treatment, electroplating and galvanization. The high-strength steel is used for making automotive bodies.