The utility model discloses a cultchless oyster off -lying sea deep water culture device. This breeding device is a box with a net, and this box with a net is the cuboid frame of being made by the reinforcing bar, and the top of this frame is equipped with the lifting rope for breed on raft frame, the bottom four corners of frame is equipped with the landing leg, be equipped with the multilayer drawer in the frame, be equipped with 6 layers of drawer of making by polypropylene plastic net in the frame, drawer bottom be equipped with a plurality of baffles. The utility model discloses utilizing this oyster cultivation device directly to put the cultchless oyster seedling in the drawer box with a net, hanging and support on off -lying sea deep water raft frame, the device is not fragile, endure the anxious ocean current and the high sea of off -lying sea, and the cost of manufacture is lower, and simultaneously, the box with a net is difficult to be damaged by the oyster, can use repeatedly.