An aluminum alloy out-opening window belongs to the field of aluminum alloy products. An open sash comprises a sash frame, a glass stop, a glass inner sealing strip, a handle and lock, a glass outer sealing strip and hollow glass, wherein the sash frame is mounted at the periphery of the hollow glass; the glass stop is buckled onto the sash frame and is used for pressing the glass inner sealing strip; the glass inner sealing strip is mounted between the glass stop and the hollow glass; the handle and lock is mounted on the sash frame and is matched with a lock mounted on a mullion or a side frame for use together; the glass outer sealing strip is mounted between the sash frame and the hollow glass; the hollow glass is mounted in the sash frame and is sandwich hollow glass; a thermal insulation layer between two pieces of glass of the hollow glass should be in the same isothermal layer with a thermal insulation bridge on a sash frame profile; the characteristics of being capable of increasing thermal insulation performance and sealing performance of the aluminum alloy out-opening window, high in profile universality, and convenient to mount and use are realized and materials are saved.