An alloy steel with graded mechanical proper-ties suitable to turnouts was designed and made. In the process of forming graded mechanical properties, a graded varying section structure was adopted, which realized continuously varying transition with different ratio between strength and toughness under pressure. Graded distribution of strength and toughness in turnouts solved the contradiction between the need of high strength for long life and the need of good toughness for safe use. The largest tensile strength locating at top part of turnouts is up to 1512 MPa accompanying notch toughness of 120J/cm(2). The greatest notch toughness lying in lower part of turnouts is 338 J/cm(2) accompanying tensile strength of 895 MPa.