Positioning device applied to underwater pre-buried steel pipe

A positioning device applied to an underwater pre-embedded steel pipe comprises a pre-embedded steel pipe bearing structure, a pre-embedded steel pipe limiting structure, a pre-embedded steel pipe positioning structure and a lifting structure for adjusting the elevation of the pre-embedded steel pipe. The lifting structures for adjusting the elevation of the embedded steel pipes are arranged at the four corners of the bottom of the embedded steel pipe bearing structure, the embedded steel pipe limiting structures are symmetrically arranged on the embedded steel pipe bearing structure, and the embedded steel pipe positioning structures are symmetrically arranged at the top ends of the embedded steel pipe limiting structures. By means of the device, the steel pipe can be embedded and positioned underwater, positioning of the steel pipe is accurate, underwater operation is convenient, the lifting structure and the positioning structure control the vertical elevation and the horizontal position respectively, the