Building curtain wall positioning tool

The utility model discloses a building curtain wall positioning tool, and relates to the field of building equipment. A building curtain wall positioning tool comprises a box body, one side of an inner cavity of the box body is movably connected with a first screw rod through a bearing, the surface of the first screw rod is in threaded connection with a first movable block, the top of the first movable block is fixedly connected with a supporting column, the surface of the supporting column is movably connected with a curtain wall body, and storage boxes are arranged on the front face and the back face of the supporting column. A nut is fixedly connected to the inner wall of the storage box, a second screw is in threaded connection with the interior of the nut, a second movable block is in threaded connection with the surface of the second screw, a third movable block is fixedly connected to the bottom of the second movable block, a supporting rod is movably connected to the interior of the third movable bloc