The hydraulic stone splitter is designed using the wedge principle to grasp the brittleness of rock and concrete - it can release great splitting force outward in a narrow hole. The high-pressure oil output from the pump station drives the oil cylinder to generate massive thrust, which operates the middle wedge in the wedge group to drive forward and stretch the reverse wedge to both sides. Therefore, the huge rocks can be easily split with a splitting machine in a few seconds, so that the hard ores can be separated from the mountains.