A kind of device is disclosed, some section that there is cylindrical dust airplane to go ahead and the blackboard eraser for falling slurry chalk powder. Work as clean blackboard eraser, chalk power should dust off by heating the rubber in the plane or hitting two blackboards and clip the whiting that dusts off. Moreover, machine is existed using a kind of absorption powder, but the machine generates very big noise, and cannot absorb powder clean blackboard eraser well. The dust-suction eraser includes moveable fixed plate and secures fixed blackboard eraser; Brush has the counter clockwise direction of right brush rotation, and there is left brush down current is formed when being rotated in a clockwise direction by the blackboard eraser along the edge shape; A kind of filter, including fenestra size are less than whiting powder and will not escape, and only pass through air; The whiting to have narrowed downwards with path can easily fall down. The dust-suction eraser both prevents caused by ambient enviroment pollution and soil dispersion powder, when with the direct exfoliation of hand, and does not need the hand of direct force conveniently. In addition, before the absorption blackboard eraser deduster that is less than of level of noise is widely used, powder no remaining blackboard eraser that dusts off recycles cleaning. ;The 2015 of copyright KIPO submissions
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