Labyrinth type anti-oil dripping oil hold ventilation cap device for ship

The utility model provides a labyrinth type anti-oil dripping oil hold ventilation cap device for a ship, which comprises a movable upper cover, a base plate and a ventilation cap, wherein the ventilation cap is fixed in the middle of the base plate, and an anti-explosion net is arranged at the periphery of the ventilation cap; the movable upper cover is detachably installed on the base plate, a plurality of locating plates are arranged on the inner peripheral wall at two sides of the movable upper cover at intervals, so that space is maintained between the bottom end of the movable upper cover and the base plate, separating plates are respectively arranged at the top end of movable upper cover and the inner peripheral wall at two sides at intervals, and air vents are arranged at the periphery of the movable upper cover; and the separating plates are respectively arranged on the base plate with distance equal to the edges at two sides, and the base plate is provided with an oil drain cock. The ventilation cap