The invention relates to an electric blackboard eraser. The electric blackboard eraser comprises a frame of which the bottom is provided with a hair brush, wherein a parallelogram connecting rod mechanism and a steering engine for directly or indirectly driving side links of the parallelogram connecting rod mechanism to swing are arranged on the frame; traveling wheels and motors for driving corresponding traveling wheels to rotate are arranged on the side links of the parallelogram connecting rod mechanism; rotating shafts of the two traveling wheels of the two side links are parallel to each other and are parallel to a rotating plane of the parallelogram connecting rod mechanism; and the traveling wheels are magnetic traveling wheels for adsorbing a blackboard. Due to the adoption of the parallelogram connecting rod mechanism, a synchronous steering process can be realized, and the electric blackboard eraser can finally rotate and travel on the blackboard freely without any external driving equipment. Due to the arrangement of an adjustment mechanism, the contact degree between the hair brush and the surface of the blackboard can be changed, so that an erasing effect can be set. Due to the adoption of a wireless remote control mode and the arrangement of a dust collection mechanism, fine dust can be prevented from being sucked into human bodies.