Universal testing machine

The utility model relates to a universal testing machine which comprises a base, a supporting column extending in the vertical direction is arranged on the base, an upper cross beam and a lower cross beam which are distributed in the vertical direction are arranged on the supporting column, the lower cross beam is fixedly arranged on the upper surface of the base, and the upper cross beam slides in the vertical direction along the supporting column through a driving device. A clamping device used for clamping a workpiece is arranged on the lower cross beam, the clamping device comprises two clamping blocks, a driving part and a connecting part, the two clamping blocks are arranged in the horizontal direction and slidably arranged on the lower cross beam in the horizontal direction, the driving part is arranged on the lower cross beam, and the connecting part is arranged on the lower cross beam. The connecting piece is arranged between the driving piece and the clamping blocks and used for driving the clamping