Motor and heat dissipation device thereof

The invention provides a motor, which comprises a stator, a rotor, a plurality of radiators and a heat dissipation device. The stator is provided with a shell part, the shell part is provided with a first surface, a second surface and a plurality of side walls, and each radiator is respectively arranged on different side walls of the shell part; and the heat dissipation device comprises a wind scooper and a plurality of first fans, wherein the motor is sleeved with the wind scooper through the bottom of the motor, the wind scooper is provided with a wind guiding main plate and a plurality of wind guiding side plates, each wind guiding side plate vertically extends from different side edges of the wind guiding main plate to the same direction and is arranged corresponding to one of the plurality of radiators, at least one wind guiding side plate is provided with at least one hole, the number of the holes is the same as that of the first fans, and the first fans are accommodated in the corresponding holes one t