Electric blackboard eraser

The utility model relates to an electric blackboard eraser, which is characterized in that a longitudinal drive motor (14) is fixed on a controller base (11), the longitudinal drive motor (14) is connected with a drive screw (4) by a coupler (12) of the longitudinal drive motor, a longitudinal sliding plate (6) passes through the drive screw (4), longitudinal guide rails (5) are arranged at both sides of the drive screw (4), a transverse guide rail fixation frame (20) is arranged on the longitudinal sliding plate (6), a transverse drive synchronous belt (19) is positioned between two transverse guide rails (10), one end of the transverse drive synchronous belt (19) is connected with a transverse drive motor (21), and a controller display screen (17) is arranged on the upper part of controller keys (16). The utility model has the beneficial effect of realizing full-process automation of blackboard erasing by utilizing transverse and longitudinal movement mechanisms, thus not only dispensing with manual operations of human but also saving time and effort.