Bow and stern column outer plate, bow and stern column outer plate machining method and ship body structure

The invention belongs to the technical field of ship body structures, and discloses a bow and stern column outer plate, a bow and stern column outer plate machining method and a ship body structure, and the bow and stern column outer plate is a bow end outer plate arranged at the bow end of a ship body or a stern end outer plate arranged at the stern end of the ship body; in the bow and stern column outer plate, a middle keel plate extends in the length direction of the ship, the center line of the middle keel plate is located in the midship line face so that the middle keel plate can be arranged at the midship position, a left outer plate is located on the left side of the middle keel plate and welded to the left side wall of the middle keel plate, and a right outer plate is located on the right side of the middle keel plate and welded to the right side wall of the middle keel plate. Therefore, the left side outer plate and the right side outer plate do not need to cross a midship, the situation that the ben