Integrated oil charging and pressurizing system for pressure chamber of rock mechanics testing machine

The utility model provides an integrated oil-filling pressurization system for a pressure chamber of a rock mechanics testing machine. The integrated oil-filling pressurization system comprises the pressure chamber, an oil-filling system and a pressurization system, wherein the oil-filling system and the pressurization system are communicated with each other; the oil filling system comprises an oil tank, a servo valve and a one-way valve which are connected in sequence, and the one-way valve communicates with the pressure chamber; an oil pump is arranged in the oil tank; the supercharging system comprises a single-stage supercharger and a first pressure gauge arranged at the outlet end of the single-stage supercharger; the single-stage supercharger comprises a piston, a high-pressure cavity and a low-pressure cavity, the supercharging multiple of the single-stage supercharger is 4-6; an oil outlet of the oil tank is communicated with an oil port P of the servo valve, an oil port A of the servo valve is connec