Screw type mechanical docking jack for underwater vehicle

The invention discloses a screw type mechanical docking jack for an underwater vehicle. The screw type mechanical docking jack comprises a horn mouth, a connecting area, an annular groove and a buffer area, the horn mouth has a large front end and a small tail end; the front end of the connecting area is connected with the tail end of the horn mouth, and the diameter of the front end of the connecting area is the same as that of the tail end of the horn mouth; the inner ring of the connecting area is provided with a thread matched with a butt joint tool. The annular groove is formed in the tail end of the connecting area, and the inner diameter of the annular groove is larger than the diameter of the tail end of the connecting area; a discharge hole is formed in the annular groove; the front end of the buffer area is connected with the annular groove, and the buffer area is connected with the underwater vehicle. The device is simple in structure and convenient to install, has the advantages of generalization