The invention discloses a dustproof anti-accumulation blackboard eraser. The dustproof anti-accumulation blackboard eraser comprises a blackboard eraser frame. An erasing cavity is formed in the blackboard eraser frame. A driven brush and a driving brush are rotatably connected to the inner wall of the erasing cavity. One side of the driving brush is sleeved with a conveying belt. A collection groove is formed in the lower side of the blackboard eraser frame. A mounting groove is formed below the collection groove. A dust box is clamped in the mounting groove. A first opening is formed in thecollection groove. A second opening is formed in the mounting groove. According to the dustproof anti-accumulation blackboard eraser, the brushes are arranged in the blackboard eraser frame, and the erasing mode based on the brushes can effectively prevent the situation that dust adheres to and is accumulated on the surfaces of original blackboard erasers; and meanwhile, the collection groove andthe mounting groove are formed in the blackboard eraser frame so that dust generated in the wiping process can be collected, and the situation that dust flies when a blackboard is wiped is avoided.