Pneumatic loading and unloading rock creep test device and method

The invention discloses a pneumatic loading and unloading rock creep test device and method, and relates to the field of rock mechanics experiments. The device mainly comprises a supporting cylinder body, an axial loading rod, a gas pressurizing cylinder body, a pressurizing movable cylinder body and a manual reversing valve, according to the device, the gas flowing direction is switched through the manual reversing valve, gas loading and unloading are achieved in cooperation with the axial loading rod, the gas pressurizing cavity and the gas pressurizing cavity, and pressure amplification anddead load are achieved through the ratio of the sectional areas of the two ends of the axial loading rod; according to the device, gas pressurization loading and unloading are adopted, the loading speed is slow, controllable and stable, and the device is not limited by extreme conditions; the whole device is simple, easy to disassemble, convenient to operate, low in requirement and limitation onthe size of the rock sampl