Kelp seedling cultivation cage

The utility model relates to the technical field of kelp seedling culture, in particular to a kelp seedling culture cage which comprises a net cage, a protective cover is arranged on the outer side of the net cage, a plurality of water through grooves are evenly formed in the protective cover, and a flow limiting assembly is arranged in each water through groove and comprises an installation ring and a plurality of control pieces. A plurality of groups of control pieces are arranged on the mounting ring in a hinged mode, the plurality of groups of control pieces are matched with one another and are arranged in a conical shape, a limiting ring is arranged in the water passing groove in a sliding mode, a first telescopic assembly is arranged between the limiting ring and the mounting ring, and the plurality of groups of control pieces abut against and are matched with the inner wall of the limiting ring. Water flow can be prevented from directly impacting the fries, and the survival rate is increased; the flow