The invention discloses a permanent magnet motor. The permanent magnet motor comprises a rotating shaft, a casing, a transmission end cover, a non-transmission end cover, a rotor component arranged onthe rotating shaft and a stator component arranged in the casing, wherein the transmission end cover and the non-transmission end cover are respectively arranged at two ends of the casing; cooling blades are arranged on the rotating shaft; ventilation openings are formed in the transmission end cover and the non-transmission end cover; a cooling channel for communicating the ventilation openingsin the transmission end cover and the non-transmission end cover is formed in the rotor component; and the cooling blades are positioned between the two ventilation openings. The motor has the advantages of a compact structure, a low cost, the capability of effectively reducing the internal temperature of the motor and the like.