The present disclosure provides a windproof cover unit for optical fiber fusion splicer. The windproof cover unit includes a windproof cover, a mounting base unit, a flexible printed circuit (FPC) unit, and a rotational axle of the windproof cover, wherein the windproof cover comprises a protruding cover surface, an inner space, and a white-light lamp unit for providing illumination for the optical fiber fusion splicer in the inner space.