Electro-hydraulic servo fatigue testing machine

The utility model discloses an electro-hydraulic servo fatigue testing machine in the technical field of fatigue testing machines, which comprises a workbench with support legs, a fixed seat with an opening at the bottom is inserted and fixed in the center of the upper end of the workbench, placing plates are symmetrically hinged to the bottom of the fixed seat, and connecting blocks are symmetrically fixed on the front and rear sides of the upper end of the fixed seat. An adjusting lead screw is in threaded connection with the interior of the connecting block, a pressing block is fixed to thebottom of the adjusting lead screw, cavities are formed in the left side and the right side of the fixing base correspondingly, air outlet holes are obliquely formed in the sides, located in the cavities, of the fixing base and communicate with the cavities, and an air outlet mechanism is fixed to the position, located on the rear side of the fixing base, of the upper end of the workbench; the supporting plate is used fo