"Tiny Cooling Fan" includes a rotor, a stator and a fan frame; the rotor includes fixed to the motor housing and the inner wall of the annular permanent magnet fixed to the motor housing radially outer wall of the fan ring, and the ring is fixed to an axial fan the inner end of the rotor shaft center to extend fixed on the rotor shaft and two bearings; the stator comprises a stator lamination and the upper and lower insulating base, as well as wound on the stator winding and a printed circuit connected to the stator winding electric plate; after the "Tiny Cooling Fan" of the stator is assembled into a mold, plastic injection molding with a hollow cylindrical seal overall printed circuit board connected to the two input supply line leads from the inner seal whole; The overall seal stator cooling fan into the frame, outside the framework of the bearing sleeve at the bottom of "Tiny Cooling Fan" frame, and then fixed the two bearing rotor shaft into the central space of the stator, so that the two bearing stand within the framework of the cooling fan bearing frame fixed to the bottom of the cooling fan can be powered running for.