Deep-water cage lifting device

The invention relates to a deep-water cage lifting device comprising a sinker, a float, an inflating pipe for connecting the sinker and the float, and a plurality of sinker lifting sets. The sinker lifting sets are used to suspend the sinker right below a cage through ropes; the float floats on water. The float comprises a housing, an air compressor and a reversing valve; the air compressor and the reversing valve are disposed within the housing. The air compressor is communicated with the inflating pipe through the reversing valve. According to the deep-water cage lifting device, a method of the sinker injecting water is controlled through the reversing valve to allow the cage to submerge, the air compressor inflates the sinker to float the cage, or the air compressor and a gas generator coordinate to float the cage. The deep-water cage lifting device allows the cage to float or submerge by means of remote control, so as to resist waves and protect from damage during the floating or submerging process. Meanwhile, new energy resources are used to generate power which powers the deep-water cage lifting device, so that energy utilization rate is increased.