Hydraulic power device of press machine for isostatic pressing graphite processing

The invention relates to the field of hydraulic elements, in particular to a hydraulic power device of a press machine for isostatic pressing graphite machining, which comprises a hydraulic cylinder, an oil passing assembly and a regulation and control compensation assembly, and the hydraulic cylinder is provided with an oil passing port, an oil inlet, an oil outlet, an air vent and a hydraulic rod; the oil passing assembly comprises two oil passing pipes, two ball valves and two one-way valves, a steering convex shaft is arranged at one end of each ball valve, a steering pull rod is fixedly connected to the exterior of each steering convex shaft, and each steering pull rod is connected with the corresponding ball valve through a torsional spring; the regulation and control compensation assembly comprises a translation mechanism, a gear motor, a gear and two pull ropes. An axial tooth groove is formed in the outer cylindrical wall of the hydraulic rod. According to different motion states of the hydraulic rod