Counter bore type fixing tool clamp for finish machining of end face of cylinder cover

The utility model relates to the technical field of clamping tools, in particular to a counter bore type fixing tool clamp for finish machining of the end face of a cylinder cover, which comprises a bottom plate, a plurality of supporting seats are arranged on the bottom plate, the cylinder cover is arranged on the supporting seats, each supporting seat comprises a base, a cylinder body is arranged on the base, cavities are arranged in the cylinder body and the base, movable threaded plates are arranged in the cavities, and the movable threaded plates are arranged on the base. The inner sides of the movable threaded plates are provided with threads, the number of the movable threaded plates is at least two, springs are arranged on the side faces of the lower ends of the movable threaded plates, the springs are arranged in the cavities, one ends of the springs are connected with the movable threaded plates, and the other ends of the springs are connected with the cylinder body or the base. When the counter bor