Dynamic and static stiffness fatigue testing machine

The utility model discloses a dynamic and static stiffness fatigue testing machine which comprises a bottom box, the top of the bottom box is fixedly connected with a base, and the two sides of the top of the base are fixedly connected with lifting cylinders. The lifting rods on the two lifting cylinders can be controlled by the control knob on the outer control box to drive the movable loading beam to lift at a proper position on the support column, the lifting rods are locked by the two clamping cylinders, and the pressing plate is connected with the servo valve, so that a matched sample in the high-low temperature box is clamped by the upper pressure plate and the lower pressure plate; the servo valve is an execution element of the dynamic and static stiffness fatigue testing machine, can have large amplitude, can reliably and accurately control force and position, and forms a closed-loop system with feedback of a sensor on a matched host, so that the working efficiency is improved, and the problems that t