The invention discloses a motor shell structure for automobile parts. The motor shell structure comprises a shell, a rotating shaft through hole, a fixing sleeve, a threaded cover, a rubber ring, longcooling holes, cooling fins, mounting frames, mounting holes, a fixing ring, a fan cover, round holes, screw rods and nuts. The motor shell structure is reasonable; compared with a traditional motorshell structure, the long cooling holes are uniformly formed in the periphery of the shell wall of the shell; air flow generated by a fan in the fan cover can pass through the long cooling holes, canprovide cooling for the periphery of the shell, and is matched with the effect of the cooling fins, so that the cooling effect can be effectively improved; the fixing sleeve, the threaded cover and the rubber ring are arranged at the rotating shaft through hole, a rotating shaft of a motor penetrates through the middles of the rotating shaft through hole, the fixing sleeve, the rubber ring and thethreaded cover, and the rubber ring is in contact with the surface of the rotating shaft, so that the joint of the rotating shaft and the shell can be protected, and the entry of dust can be reduced;and the fixing sleeve is in threaded connection with the threaded cover, so that the threaded cover can be conveniently mounted and dismounted, and the replacement of the rubber ring can be conveniently carried out.