Expanding type pressure-bearing plugging packer

The expanding type pressure-bearing plugging packer comprises an inner cylinder part and an outer cylinder part, the inner cylinder part comprises a central pipe and a circulation pipe set, the outer cylinder part comprises a rubber cylinder, and the rubber cylinder is arranged on the periphery of the central pipe in a sleeving mode. The center pipe is provided with an installation cavity, the circulation pipe set is provided with a circulation cavity, the circulation pipe set is located in the installation cavity and relatively fixed to the center pipe through a first pin and a second pin, a lateral groove and an expansion sealing through hole are formed in the side wall of the installation cavity, and a through hole is formed in the side wall of the circulation cavity. When the first pin is broken, the first part of the runner pipe group can move relative to the central pipe, when the first part moves to a first position, the expansion sealing through hole is communicated with the mounting cavity, and when