Grade "Waterproof Cooling Fan", comprising a rotor, a stat and a fan frame; a rotor fixed to the motor housing comprises an inner wall of an annular permanent magnet and fixed to the radially outer wall of the motor housing of the blade ring and the ring is fixed to the blade an axially extending end face of the inner rotor to the central shaft and fixed to the rotor shaft of the dual-bearing; a stat including a stat lamination and the upper and the lower insulating holder, and the stat winding and the electrical winding thereon the stat winding is connected printed circuit board; the "Waterproof Cooling Fan" stat is assembled into a mold, plastic injection molding using a hollow cylindrical seal overall printed circuit board connected to the two input power cord from the seal as a whole in the lead; the seal into the overall cooling fan stat frame, outside bearing cooling fan at the bottom of the frame set in the frame, and then fixed the two bearings of the rotor shaft and the stat central space, so that the two bearings in the stand the "Waterproof Cooling Fan" within the framework of the frame at the bottom of the fixed bearing, which can be powered cooling fan running for. The real high-grade waterproof cooling fan with low cost, good water effects, etc.