Positioning device

The utility model provides a positioning device, which relates to the technical field of building construction, and comprises a bottom plate, a positioning block, a positioning block, a positioning block and a positioning block, and is characterized in that the middle of the bottom plate is provided with a through hole penetrating through the upper and lower surfaces; the square frame is connected to the upper surface of the bottom plate, and the through hole is formed in the inner side of the square frame; each edge of the square frame is provided with a locking structure, and the multiple locking structures can move towards or away from the center of the square frame. The supporting frame is connected with the bottom plate; the movable beam is in sliding connection with the supporting frame in the first direction; the first direction is respectively vertical to the vertical direction and the length direction of the movable beam; the sliding block is in sliding connection with the movable beam in the length