Abstract: A squirrel-cage rotor, an electric motor and a washing machine are provided. The squirrel-cage rotor includes a rotor core, a squirrel-cage guide bar and a squirrel-cage short-circuit ring. The rotor core is provided with a rotor groove penetrating through an end surface of the rotor core. The squirrel-cage guide bar is provided in the rotor groove. The squirrel-cage short-circuit ring is provided on the end surface of the rotor core and is connected to the squirrel-cage guide bar, in which a height of the squirrel-cage short-circuit ring in an axial direction of the rotor core is denoted as H. A minimum inner diameter of the squirrel-cage short-circuit ring is denoted as D1. A maximum outer diameter of the squirrel-cage short-circuit ring is denoted as D2, and wherein 7 mm?H?14 mm and 0.53?D1/D2?0.78.