The embodiments of the present disclosure provide a motor external rotor, a brushless permanent magnet motor and an electrical product, the motor external rotor including: a first inner cylinder portion, an outer cylinder portion located at a radial outer side of the first inner cylinder portion, and a connection portion radially connecting the first inner cylinder portion and the outer cylinder portion, the connection portion including: a plurality of first web sections extending from an axial side of an outer circumferential surface of the first inner cylinder portion in a direction away from the first inner cylinder portion; a plurality of second web sections extending from the other axial side of the outer circumferential surface of the first inner cylinder portion in a direction away from the first inner cylinder portion, and the plurality of second web sections and the plurality of first web sections being arranged circumferentially at intervals; and a plurality of axial connection sections extending from the outer circumferential surface of the first inner cylinder portion in a direction away from the first inner cylinder portion, and axially connecting the first web sections and the second web sections. The motor external rotor in the embodiments of the present disclosure has a simple structure and high strength and rigidity, air gaps of the motor external rotor are uniform, and running noise of the motor is reduced.