The invention relates to the field of motors, in particular to a closed motor with internal and external cooling air paths, which comprises a shell of which the inner wall is uniformly provided with a plurality of
magnetic poles, an end cover fixed at one end of the shell, and a rotor of which the two ends respectively penetrate through and are rotationally connected to the centers of the shell and the end cover, each
air channel corresponds to a gap between two adjacent
magnetic poles, the air channels are communicated with the gaps at the ends away from the end cover, the end cover is provided with a rotating channel communicated with the multiple air channels, and fan blades I are fixed to the position, close to the end cover, of the rotor. And a cavity tube is sleeved on the shell. A plurality of cooling fins are evenly arranged on the outer side of the cavity
pipe. Two side lug pipes are symmetrically arranged on the cavity
pipe, communicating pipes are arranged at the two ends of the end cover, the two communicating pipes are in
butt joint communication with the two side lug pipes respectively, inner cavity plates are fixed to the ends, away from the side lug pipes, of the two communicating pipes, and spiral frames are rotationally arranged in the two communicating pipes. The motor can effectively dissipate heat, and the temperature rise of the motor is prevented from being too high.