Separating device and separating method of submarine cable stretching clamp

The invention relates to a separating device and a separating method of a submarine cable stretching clamp, and the separating device is characterized in that a jacking driving assembly, a jacking part and a limiting cylinder are all installed in a support structure, and after the submarine cable stretching clamp is placed in a working space formed by the jacking part and the limiting cylinder, the submarine cable stretching clamp can be clamped by the jacking part and the limiting cylinder; in the process of separating the positioning groove cone from the core rod, due to the fact that the limiting cylinder abuts against the end face, away from the abutting piece, of the outer cone sleeve and/or part of the positioning groove cone, the abutted part is limited in the axial direction, and the non-abutted part can be ejected into the limiting cylinder under the action of the pressure loaded by the abutting driving assembly. Therefore, the core rod and the positioning groove cone of the submarine cable stretchin