Hatch for marine watertight cabin

The invention belongs to the technological field of ship building, in particular to a hatch for marine watertight cabin, which comprises a pair of cover plates, a support and a compression device. The cover plate is provided with a plurality of compression devices. The cover plate comprises a upper plate and a lower plate, wherein the upper plate is longer than the lower plate. There is an empty cavity between the upper plate and the lower plate; the support comprises the rectangular frame and the main beam. The main beam is fixed to the center of the rectangular frame through the connection plate. The rectangular frame is embedded into the deck; the cover plate is embedded into the rectangular frame. One side of the cover plate is connected to the rectangular frame through the upper plate and the double hinge and the other side is attached to the main beam by the upper cover plate. The hatch has the advantage of the labor, material and financial savings. The embedding arrangement saves the deck space. The ha