The invention discloses a ship hatch cover supporting device. The device comprises a hatch cover, a hatch coaming, supporting components and end clamping bases, wherein the hatch coaming is arranged on a main deck to form a ship hatch, the hatch cover is arranged on the ship hatch, the supporting components are arranged on the hatch cover, and the end clamping bases are arranged on the two sides of the ship hatch respectively and are used for fixing the supporting components. According to the structure of the device, a hatch cover rail extending out of the hatch coaming and supports of the hatch cover rail are omitted, the deck surface space utilization rate is improved, meanwhile, the passage of the personnel on a deck surface is more smooth, in addition, the hatch cover can be opened towards the left side and the right side of the ship, so that the flexibility of the ship wharf operation is improved.