A triaxial servo rigid testing machine for rock and concrete produced by the American MTS company, has three independent closed-loop servo control functions of axial pressure, confining pressure and pore water pressure. Compression test, creep / relaxation test, fluid-structure coupling test, etc., can achieve maximum axial pressure / tension 4600kN / 2300kN, maximum dynamic confining pressure 140MPa, maximum pore water pressure 140MPa.