The invention discloses a cleaning device of a micro-motor shell. The device comprises a base, wherein supporting plates are fixedly connected to the two sides of the lower end of the base, a drivingmotor is installed on the side wall of one of the supporting plates, and a rotating shaft penetrates through the base; the rotating shaft is in transmission connection with the driving motor through atransmission mechanism, and a rotating block is fixedly connected above the rotating shaft; supporting blocks are fixedly connected to the lower end of the rotating block, the supporting blocks are in sliding connection with the base, and a containing groove is formed in the upper end of the rotating block; a clamping plate is arranged in the containing groove, a first sliding rod is fixedly connected to the side wall of the clamping plate, and the end, far away from the clamping plate, of the first sliding rod penetrate through the side wall of the rotating block; and a first spring sleevesthe part, located in the containing groove, of the first sliding rod, the two ends of the first spring are correspondingly and fixedly connected with the clamping plate and the side wall of the containing groove, and a vertical plate is fixedly connected to the upper end of the base. The cleaning device of the micro-motor shell is simple in structure, convenient to use, time-saving and labor-saving, and high in cleaning efficiency.