Bending machine supporting structure

The utility model belongs to the field of dies, and particularly relates to a bending machine supporting structure which comprises a punch, a workbench and a supporting part, and a limiting rod is arranged at the upper end of the punch. The supporting part is vertically provided with a guide rail at each of four corners of the workbench, the upper end of each guide rail is fixedly provided with a fixed pulley, and the lower end is provided with a gear capable of moving along the guide rail; a transmission chain is arranged between the same group of guide rails symmetrically distributed at the two ends of the workbench, in the same guide rail group, one end of the transmission chain is fixedly connected with one gear, and the other end of the transmission chain is fixedly connected with a limiting rod around a fixed pulley of the same guide rail and then is fixedly connected with a gear on the opposite side by bypassing a fixed pulley on the opposite side; and a connecting rod is fixedly connected between the