High-speed environmental-friendly blackboard eraser

The utility model relates to a blackboard eraser, in particular to a high-speed environmental-friendly blackboard eraser. The blackboard eraser provided by the utility model comprises an eraser body and hairs, wherein the hairs are mounted on the surface of the eraser body. The blackboard eraser is characterized in that the eraser body connected with a motor is embedded in guide rails on the upper and lower edges of a blackboard via rollers; a dust collecting box is connected behind the eraser body; a duct running through the eraser body is arranged inside the eraser body and is connected with a dust absorbing machine in the collecting box; and an openable dedusting cover is mounted at the bottom of the dust collecting box. The blackboard eraser is not only time-saving and labour-saving, but also is environmental-friendly.