Restoration body for processing multi-stage deformed buried and clamped fish and device comprising restoration body

The invention discloses a restoration body for processing a multi-stage deformed buried and clamped fish, which comprises a rod-shaped body, the rod-shaped body comprises an external expansion section and an insertion section which are sequentially arranged along the length direction of the rod-shaped body, the outer diameter of the external expansion section is not less than the inner diameter of a core shaft of the fish, and the insertion section is in the shape of a cone; through holes which are communicated with one another and are formed in the length direction of the rod-shaped body and used for workover fluid to flow are formed in the external expansion section and the insertion section; when the rod-shaped body is arranged in a fish, the external expansion section is arranged in an upper connector of the fish in a matched mode, so that the upper connector is in a non-rebounding external expansion state, and the insertion section is arranged in the mandrel in a matched mode and used for cleaning sundri