Energy-saving ventilating window for building

The utility model belongs to the technical field of ventilating windows, and discloses an energy-saving ventilating window for buildings, which comprises an outer frame, a liquid storage box and an inner frame are sequentially arranged on the inner side of the outer frame from top to bottom, the liquid storage box is fixed with the outer frame, a group of through holes are formed in the bottom of the liquid storage box, the inner frame is rotatably connected with the outer frame, and hollow glass is fixedly mounted on the inner side of the inner frame. Transverse plates are arranged on the two sides of the hollow glass, magnets are arranged in the two transverse plates, a layer of bristles is arranged on the transverse plate located on the outer side, the bristles make contact with the hollow glass, and a tightening piece is fixed to the transverse plate located on the inner side. When dust on the outer surface of the hollow glass needs to be cleaned, cleaning liquid can be poured into the liquid storage box