Limiting and clamping mechanism of bending machine

The utility model discloses a limiting and clamping mechanism of a bending machine, which comprises a working table, a support is arranged on the upper surface of the working table, a hydraulic cylinder is mounted on the support, a piston rod of the hydraulic cylinder is connected with a linkage connecting plate, two ends of the linkage connecting plate are movably connected onto the support, a bending upper die is mounted on the linkage connecting plate, and a bending lower die is mounted on the bending upper die. A bending upper die is arranged on the workbench, a bending lower die is arranged below the bending upper die, the bending lower die is arranged on the workbench, a limiting clamping assembly is further arranged on the workbench, the limiting clamping assembly is located on one side of the bending lower die, and the limiting clamping assembly is used for clamping a plate and limiting the plate. The limiting clamping assembly is used for clamping and limiting the plate, so that the plate does not mo