The utility model relates to an environment-friendly eraser, which belongs to the technical field of teaching tools. An environment-friendly eraser comprises an eraser body consisting of a top plate, a bottom plate, a front plate, a back plate and two side plates, wherein a felt for wiping the blackboard surface is arranged on the front plate, a solar panel for providing energy is arranged in the middle of the back plate, magnetic strips for absorbing dust are arranged on both sides of the solar panel, a dust inlet is arranged on one side plate of the eraser body, a touch switch is arranged on one side of the dust inlet, a dust outlet is arranged on the bottom plate, and a pull-out switch is connected to the dust outlet. The environmental-friendly eraser of the utility model makes up for the shortcomings of the common eraser. By centralized absorption and centralized discharge of dust, a large amount of dust is reduced from being directly discharged into the atmosphere, and the indoor sanitation and surrounding environment are kept clean, which is not only beneficial to people's health, but also energy-saving, environmental-friendly, economical and practical.