The invention discloses a motor module comprising the following parts: an upper housing; a lower housing combined with the upper housing so as to form a contain space; a draining box arranged below the lower housing and having a draining blade inside; a motor part arranged in the contain space and having a rotor, a stator, a drive shaft and two bearings. The motor part has no upper lid and lower lid; the rotor is arranged on the stator; the drive shaft is arranged on the rotor; one end of the drive shaft is arranged in the draining box and connected with the draining blade; the two bearings are arranged on the drive shaft and located above and below the stator and the rotor. The assembling process of the motor can be simplified, thus improving the assembling speed.