The utility model relates to an aluminum alloy side -hung window locking ware tapered end, including base and tapered end piece, base and tapered end piece formula structure as an organic whole, the tapered end piece is square pieces of circular arc for both ends. Tapered end piece width and locking piece spout width adaptation. The tapered end whole adopt the kirsite preparation. The utility model discloses increase the area of contact of tapered end and locking piece, with reducing the pressure that the tapered end receives under the equal pressure condition, tapered end and locking piece all are difficult to damage, improve door and window wind pressure grade. The tapered end is as an organic whole with the base, prevents to become flexible, and antitorque song is effectual, increases the stability that the locking is sealed.