Composite die for trimming flat forgings

The utility model belongs to the related technical field of flat plate type forgings, and particularly relates to a composite die for trimming flat plate type forgings, which comprises a base and a heat dissipation mechanism, a clamping groove is arranged on the upper surface of the base, a buckle is sleeved in the clamping groove, the upper end of the buckle is fixedly connected with a lower die, and the lower die is fixedly connected with the heat dissipation mechanism. A positioning alignment guide column is arranged above the base, supporting columns are fixed to the two sides of the upper portion of the base, a top plate is welded to the upper ends of the supporting columns, a hydraulic cylinder is installed at the top end of the inner side of the top plate, a hydraulic rod is arranged below the hydraulic cylinder, an upper pressing plate is fixed to the lower end of the hydraulic rod, and a positioning sleeve penetrates through the lower portion of the upper pressing plate. An upper die is mounted below