Abstract: A motor forcibly cooling device with a rear drive assembly includes a motor body and a motor rotating shaft extended out from a center thereof toward one side or two sides thereof, another end of the motor body being assembled with a annular frame to form a covering space allowing a drive and cooling plate to be mounted therein, where the motor rotating shaft is extended out of a through hole configured on a center of the cooling plate to assemble a leaf group on the motor rotating shaft directly, allowing the leaf group to be rotated with the motor, a windshield is configured outside the leaf group to cover a connection of the leaf group with annular frame, allowing the leaf group to cool forcibly the cooling plate and a peripheral face of the motor body through a wind direction guiding covering edge face of the windshield.