Multi-sealing casement window with built-in folding screen window

The multi-sealing casement window with the built-in folding screen window comprises an outer frame, a folding screen box and a window sash, the outer frame is provided with a strip-shaped groove used for containing the folding screen box, the folding screen capable of sliding along one border of the outer frame is arranged in the folding screen box, and the window sash is movably installed on the outer frame. An outdoor sealing strip is arranged at the joint of the outer side edge of the window sash and the outer side edge of the outer frame, an indoor sealing strip is arranged at the joint of the inner side edge of the window sash and the inner side edge of the outer frame, and a middle sealing strip used for separating an inner cavity and an outer cavity of the profile when the window sash is closed is further arranged in the middle of the inner ring of the outer frame. According to the scheme, through the design of the folding screen box, the overall appearance effect and the visual effect of the door and