Motor cooling system and method and vehicle

The invention discloses a motor cooling system and method and a vehicle. The system comprises: at least two crankset wheels, which are fixed on the outer surface of the motor along the central axis of the motor; the cooling pipeline is arranged on the outer surface of the motor along the central shaft, a transverse groove structure is arranged on the cooling pipeline at a position opposite to the motor, a cooling liquid flowing crawler belt is arranged in the cooling pipeline, and the crawler belt is wound on at least two chain wheel wheels, moves back and forth along the central shaft in the transverse groove structure and is provided with a vertical through hole; cooling liquid in the cooling pipe is sprayed to the motor through the vertical through hole. The at least one stepping motor is arranged on the at least two crankset wheels and is used for driving the at least two crankset wheels to rotate so as to drive the crawler belt to move; and the controller is connected with the at least one stepping motor