Steering gear fatigue performance testing device

The invention relates to a steering gear fatigue performance testing device. The steering gear fatigue performance testing device comprises a test piece workbench, screw rod sliding platforms, a screw rod, a mounting base, a pressure shaft, a clamping device and a moveable platform, wherein multiple groups of transverse T-shaped grooves and longitudinal T-shaped grooves are formed in the test piece workbench at intervals; one group of screw rod sliding platform is arranged at each of the two ends of the test piece workbench; the clamping device is assembled on the test piece workbench through the transverse T-shaped grooves and the longitudinal T-shaped grooves; a steering gear test piece is assembled on the clamping device; longitudinal sliding rails are arranged on the two sides of the screw rod sliding platforms; the mounting base is arranged on the sliding rails; one end of the screw rod is fixedly arranged on the screw rod sliding platforms and the other end of the screw rod is connected with the bottom