Brushless two-speed motor

The utility model relates to a brushless two-speed motor which is especially suitable for being used for an electric bicycle. The utility model is provided with a stator and a rotor, wherein the stator is composed of a stator iron core, a winding, a bracket and a shaft, and the rotor is composed of a shell, a end cover and magnetic steel. A stator winding is formed by the way that two windings which have unequal winding section areas are connected in series, the ratio of the winding section areas of the two windings is 1.40-1.60: 0.90-1.10, the height of the magnetic steel is 38-45MM, and the height of the stator iron core is 38-45MM. When the motor is operated in a high speed, the brushless two-speed motor of the utility model can reduce the energy consumption and can increase the efficiency.