The invention discloses an elevator door motor. The elevator door motor comprises a mounting plate used for mounting a door motor onto an elevator car. A door hanging plate used for mounting an elevator door, a slide rail allowing the door hanging plate to slide on and a driving mechanism for driving the door hanging plate to slide on the slide rail are arranged on the mounting plate. A door closing mechanism used for providing door closing force is arranged between the door hanging plate and the mounting plate. A stop device used for preventing the door hanging plate from being rebounded after being pushed open is further mounted between the door hanging plate and the mounting plate. The stop device comprises a unidirectional limiting mechanism mounted between the door hanging plate and the mounting plate and used for limiting the sliding direction of the door hanging plate and a control assembly matched with the unidirectional limiting mechanism. The control assembly controls the unidirectional limiting mechanism to prevent the door hanging plate from sliding reversely after being pushed open. The control assembly controls the unidirectional limiting mechanism to cooperate or not. In the pushing process, the unidirectional limiting mechanism is controlled through the control assembly, the door hanging plate can be prevented from reversely sliding under the action of door closing force or force of steel wire ropes or other things, and then the door hanging plate is likely to pinch hands.