Fixing structure for triploid oyster culture

The utility model relates to the technical field of triploid oyster cultivation, and discloses a fixing structure for triploid oyster cultivation. The fixing structure for triploid oyster culture comprises a box body, the bottom of the box body is fixedly connected with a connecting rod, the bottom of the connecting rod is fixedly connected with a rotating cylinder through a bearing, one end of the connecting rod is provided with two sets of rubber bands, and the bottoms of the two sets of rubber bands are installed at one end of the rotating cylinder; the rubber band is unfolded and wound on the outer wall of the rotating cylinder by a certain number of turns by rotating the rotating cylinder, so that the device sinks into water, and meanwhile, the rubber band retracts in the descending process due to the fact that the rubber band loses limitation, so that the rotating cylinder is pulled to rotate, and the rotating cylinder drives the rope and the grapnel to rotate around the rotating cylinder; and thus, the