Deep sea buoy structure

The invention discloses a deep and far sea buoy structure, which comprises a buoy main body, an instrument mounting cavity and an instrument mounting cavity, each outer buoyancy supporting assembly comprises a supporting cross rod, a connecting rod extending downwards is arranged on each supporting cross rod, and a sub-floating body is arranged on each connecting rod; the supporting cross rod is detachably arranged on the buoy body. By arranging the multiple detachable outer buoyancy supporting assemblies on the buoy body, the size of a buoyancy storage cabin needing to be arranged in the buoy body is effectively reduced, the multiple sub-floating bodies are distributed on the outer side of the buoy body, the floating area on the sea surface can be increased, the buoyancy can be increased, and the service life of the buoy body is prolonged. Therefore, the buoyancy loss caused by the reduction of the volume of the buoy main body is made up; when the buoy structure is carried to an engineering ship, the outer b