Marine ranch breeding cage

The utility model discloses a culture cage for a marine ranch. The culture cage comprises a cage body, a gas storage cover and a gas transmission device, the cage body is used for culturing fishes and shellfishes underwater, and the cage body is arranged underwater; the gas storage cover is arranged at the top of the cage body, and a gas storage cavity is formed in the side, close to the cage body, of the gas storage cover and used for storing air; the top of the gas storage cover is connected with an electric valve device; the electric valve device is used for realizing the gas storage capacity in the gas storage cavity through a switch of the electric valve device; the air conveying device is used for conveying air into the cage body; according to the scheme, air is conveyed into the cage body through the pipeline; when the buoyancy borne by the breeding cage is larger than the gravity of the breeding cage, the breeding cage floats to the sea surface; a fisherman does not need to mark the cage body, and can