The invention discloses a self-electricity-generating environment-friendly blackboard eraser. The self-electricity-generating environment-friendly blackboard eraser comprises a blackboard eraser body. The self-electricity-generating environment-friendly blackboard eraser is characterized in that the self-electricity-generating environment-friendly blackboard eraser further comprises a cylindrical coil, a magnet, a charging circuit, a rechargeable battery, a key switch, a dust collection micromotor and a dust collection cavity; the cylindrical coil is fixed to the upper portion of the blackboard eraser body; the cuboid magnet is placed in the cylindrical coil; two outgoing lines of the cylindrical coil are in electric connection with the input end of the charging circuit; the rechargeable battery is located on the lower side of the cylindrical coil; the charging circuit is fixed to the lower left side of the cylindrical coil; the key switch is fixed to the left of the cylindrical coil; the dust collection cavity is located on the lower left portion of the blackboard eraser body; the dust collection micromotor is fixed in the dust collection cavity; the key switch controls operation of the dust collection micromotor; when a blackboard is rubbed and the blackboard eraser body rubs the blackboard, the magnet shakes and cuts the cylindrical coil for electricity generation, the rechargeable battery is charged, and after the rechargeable battery is fully charged, chalk dust can be sucked by pressing the key switch.