Low-speed high-torque permanent magnet motor

The present invention provides a low-speed high-torque permanent magnet motor, pertaining to the field of motor. The motor comprises a motor body. An output shaft of the motor body provides kinetic energy for an external water pump. A torque transfer structure used according to actual needs is arranged between the output shaft and the water pump. The torque transfer structure comprises a decelerator and a gear pair used for adjusting connection, wherein the gear pair can choose the fact that whether the gear pair is connected with the decelerator or the water pump. The gear pair is movable axially on the output shaft, and the section, located at the side of the gear pair departing from the motor body, of the output shaft is provided with a clamping sleeve. According to the motor, in the actual use process, if the reducing of the loss of mechanical transmission is needed, the clamping sleeve is directly adopted to connect; if the adjustment of the rotating speed is needed, the gear pairis allowed to connect th