Window sash with heat preservation and heat insulation functions

The sash window with the heat preservation and heat insulation functions comprises a sash window frame, positioning sleeves are symmetrically fixed to the outer wall of the upper end of the sash window frame, positioning buttons are movably connected to the inner walls of the ends of the positioning sleeves, and positioning rods are movably arranged on the inner walls of the positioning sleeves; the heat preservation curtain cloth is connected to the outer wall of the positioning rod in a sliding mode, and hook-and-loop fastener hook faces are fixedly installed on the outer walls of the two sides of the heat preservation curtain cloth; the hook-and-loop fastener rough surfaces are fixedly connected to the outer walls of the two sides of the sash window frame, a limiting frame is fixedly installed on the outer wall of the lower end of the sash window frame, and a locking mechanism is arranged on the inner wall of the upper end of the limiting frame. According to the sash window with the heat preservation and i