The utility model provides a cage type device for breeding marine product shellfish, capable of breeding in large scale and having advantages of simple structure, low breeding cost and easy operation, characterized in that the device includes a cage and escape-proof bearing nets, the side faces and the bottom face of the cage are covered by the escape-proof bearing nets respectively, and the net hole size of the escape-proof bearing net is less than the volume of any carrier. According to the technical project, the net hole size of the escape-proof bearing net is less than the volume of any carrier, and the side faces and the bottom faces of the cage are all covered by the bearing nets, such that shellfish may be beared in the cage and get bait, simultaneously, the escape-proof bearing nets may prevent shellfish natural enemies in the ambient environment from entering into the cage to bring unnecessary loss. The utility model has advantages of simple structure, easy operation, convenient manufacture and arrangement, and reducing breeding cost greatly in a large scale.