Window positioning device

The utility model discloses a window locating device, comprising a main body, a clamping block, a push member and a switch. A second containing groove and a first containing groove are arranged on the main body; the clamping block is pivoted in the first containing groove by the axle; the push member is arranged in the second containing groove; the switch is arranged in the push member, and extended toward the bottom part of the second containing groove to form a cylinder; a fastening piece is arranged on the cylinder, one end of the fastening piece is extended into the first containing groove, and butted against the lower margin at the end part of the clamping block; when the fastening piece is separated from the lower margin of the clamping block, the clamping block is released and extrudes out of the first containing groove to limit the opening size of the window; the switch plays a locking and pulling function; and to cancel the limit, the clamping block is pressed back to the first containing groove by r