Moon pool damping device for drilling ship

The invention relates to a moon pool damping device for a drilling ship. An extension protrusion matched with the inner side wall of a moon pool is arranged at the lower portion of the front side wallof the moon pool, and a damping chamber matched with the inner side wall of the moon pool is formed in the rear side wall of the moon pool; the damping chamber comprises a top plate, a bottom plate,side plates and a front plate, wherein the side plates are connected with the two sides of the top plate and the two sides of the bottom plate, the front plate is connected with the top plate, the bottom plate and the side plates, square holes which extend in the length direction of the top plate are formed in the front plate from top to bottom at equal intervals, the damping chamber is further internally provided with several damping plates which are distributed at equal intervals, extend in the length direction of the top plate and are provided with circular holes, and the square holes are located between every two a