Chalk dust removing device

The utility model discloses a chalk dust removing device. The system comprises a blackboard, a handheld blackboard eraser and a controller, the blackboard comprises a blackboard body and an erasing device, first dust suction devices are installed on the upper portion, the left side and the right side of the blackboard body, dust detection sensors are installed on the upper side, the left side andthe right side of the surface of the blackboard body, and the first dust suction devices are connected with a first dust storage box through dust suction pipelines; the erasing device comprises an up-down sliding device, a dust brush device and a second dust suction device. The up-down sliding device comprises an upper sliding device body and a lower sliding device body. The blackboard eraser solves the problems that when teachers give lessons in a classroom, chalk characters are written on a blackboard, dust flies everywhere when the blackboard is erased, the dust is easily inhaled into lungsof the teachers, body hea