Rotary type automatic blackboard cleaning device

The utility model discloses a rotary type automatic blackboard cleaning device. The rotary type automatic blackboard cleaning device is characterized in that five felts arranged in an upper row and a lower row are driven to rotate by a motor to erase characters on a blackboard, a lead screw is driven by a stepping motor to implement up and down feeding movements of a rotating felt mechanism, a sealing ring is arranged at the periphery of the rotating felt mechanism, and dusts are absorbed in a dust collection box through a dust collecting port. The rotary type automatic blackboard cleaning device can prevent the dusts from flying upward while automatically cleaning the blackboard.