Pneumatic wedge type pressure-bearing device

The utility model relates to the technical field of pressure-bearing equipment, in particular to a pneumatic wedge type pressure-bearing device which comprises a bottom fixing seat, a supporting seat is vertically fixed on the bottom fixing seat, an air cylinder is horizontally fixed at one end of the supporting seat, a pressure-bearing mechanism is arranged at the other end of the supporting seat, and the pressure-bearing mechanism comprises a wedge block guide seat fixed on the supporting seat. An upper wedge-shaped block is vertically inserted into the top of the wedge block guide seat in a sleeved mode, a lower wedge-shaped block is horizontally inserted into the bottom of the wedge block guide seat in a sleeved mode, the lower surface of the upper wedge-shaped block and the upper surface of the lower wedge-shaped block are inclined planes and abut against each other, a sliding block is fixed to the lower surface of the upper wedge-shaped block, a sliding groove is formed in the upper surface of the lower