The invention discloses a novel moonpool cover for a drilling ship. The moonpool cover comprises a rectangular moon pool cover body, wherein at least two pairs of connecting pieces b are oppositely arranged on the two sides, close to the head and tail of a ship body, of the moon pool cover main body, the connecting pieces b are installed on the moonpool wall, at least three pairs of rolling wheelsare oppositely arranged on the two sides, close to a larboard and a starboard of the ship body, of the moon pool cover main body, two moonpool inner rails are clamped in the bottoms of the rolling wheels, at least two pairs of lifting oil cylinders are oppositely mounted at the bottoms of the two month pool inner rails, the lifting oil cylinders are installed on the moon pool wall, and a slip supporting disc is arranged in the middle of the moon pool cover body. The novel moonpool cover solves the problems that a moon pool cover is large in volume, short in service life, small in bearing drill column load and limited by the capacity and space of a ship crane in the prior art.