The utility model belongs to the technical field of the ocean, and provides a novel deep sea pressure power device used for deep sea exploration and operation. The novel deep sea pressure power device comprises a compressible liquid storage tank, a high pressure storage power cabin, and a computer control system, wherein a pressure transmitter, a filter and a throttle valve are arranged in the high pressure storage power cabin. The novel deep sea pressure power device is characterized in that: a two-position four-way electromagnetic valve, a reciprocating supercharging device, a proportional pressure reducing valve, and a proportional overflow valve are mounted in the high pressure storage power cabin; the compressible liquid storage tank is connected with the high pressure storage power cabin by a stop valve and a hydraulic oil pipe, and the high pressure storage power cabin transits the power to a hydraulic system through the hydraulic oil pipe. The sea static pressure is converted into a constant pressure source of the hydraulic system to provide a power source for a deep sea exploration and sampling device. The deep sea pressure power device is simple in structure and low in fabrication cost.