Lightning protection device for aluminum alloy window

The utility model relates to the technical field of aluminum alloy windows, and discloses an aluminum alloy window lightning protection device which structurally comprises a window frame, a water filling nozzle, an upper window body, a lower window body and a shielding gauze element. A shielding gauze element is installed at the bottom of the lower window body, and then through a sliding block and a sliding groove, when the lower window body is opened, the lower window body can horizontally move up and down along the sliding groove so as to drive the shielding gauze element to stretch out and draw back. According to the anti-mosquito window, the situations that the space is occupied when a gauze element is installed on the window and the window is very unfavorable to cleaning due to the existence of the gauze element are effectively avoided, the shielding gauze element is placed in the containing groove, the shielding gauze element does not occupy the space when the window is normally closed, the window can b