Dynamic compression-shear testing machine device

The utility model discloses a dynamic compression-shear testing machine device which comprises a base, counter-force supports are fixed at two ends of the base, each counter-force support is provided with four wedge anti-backlash devices, a cross beam is fixed at the upper ends of the two counter-force supports, a vertical oil cylinder is fixed on the cross beam, and the wedge anti-backlash devices are fixed on the vertical oil cylinder. The vertical pressure oil cylinder penetrates through the cross beam and extends to the lower end of the cross beam, an upper pressing plate is fixed to the tail end of a piston rod of the vertical pressure oil cylinder, guide rails are fixed to the two ends of the upper pressing plate, and wedge block anti-backlash devices are arranged on the four guide rails. According to the utility model, a main engine structure with two counter-force brackets and an upper oil cylinder is adopted, a linear guide rail is adopted at the lower end of the workbench, a pendulum shaft type shea