Air jet hole water blocking device suitable for ship air layer resistance reduction system and ship

The invention relates to the technical field of ship drag reduction, in particular to an air jet hole water blocking device suitable for a ship air layer drag reduction system and a ship. The ship airlayer drag reduction system comprises an air cavity. The air spraying hole is formed in the bottom of the ship body, communicates with the air cavity and is used for spraying out airflow; the air jethole water blocking device comprises an air jet hole water blocking device arranged in the air cavity and movably connected with a bottom plate of the ship body. And the driving mechanism is arrangedin the ship body and located on the outer side of the air cavity, and the output end of the driving mechanism extends into the air cavity and is connected with the air spraying hole water blocking device so as to drive the air spraying hole water blocking device to open or block the air spraying hole. Through the arrangement of the air spraying hole water blocking device, the air spraying hole can be blocked when the ship