High-voltage servo true three-axis testing machine

The utility model discloses a high-voltage servo true three-axis testing machine. A main machine body is composed of three independent loading and unloading systems which include two perpendicular loading and unloading systems and one horizontal loading and unloading system. The three independent loading and unloading systems are all high-rigidity loading and unloading frames. The testing machine is a comprehensive rigidity testing machine which can conduct single uniaxial drawing, compression and shearing tests, conventional three-axis tests, true three-axis tests and other tests, the testing machine can provide pressure which is large enough to meet the test requirements for materials like a majority of rocks, dead loads and disturbance loads can be added to rock sample test specimens in the three perpendicular directions independently in the three-dimensional space, and uniaxial and rapid unloading can be achieved. All operations are completed through a computer keyboard and a mouse, meanwhile, a necessary manual control device is arranged, and the operations are convenient and flexible.