Abstract: A sealed type motor arrangement, comprising: a micro-motor with a reduction unit and a sealed housing made of plastic, said sealed housing having a bottom housing and a cover housing, said sealed housing defines a sealed space for accommodating said micro-motor and a non-sealed space, in the periphery of said sealed space of said bottom housing, said non-sealed space having a small groove with a resilient sealing plastic washer arranged therein, said bottom housing having an opening for a cylindrical shaft of said micro-motor to extend out of said sealed housing, a plurality of small apertures are arranged symmetrically between said bottom housing and said cover housing for tightening a plurality of screws to make said bottom housing and said covered housing sealed, a wire with a power supply input plug goes through an opening on a side wall of said bottom housing and a hole on a wall between said sealed space and said non-sealed space to connect a pair of leads of said motor in said sealed space, the hole on