The invention relates to a processing clamp for machining and/or processing of workpieces with large processing forces, comprising a clamp body with a first and second clamp arm and at least a tool with at least two tool parts which are movable relative to each other and define a working region, in which at least the first tool part is arranged to be traversable along a vertical tool axis on the first clamp arm to close the working region, and the second tool part is arranged on the second clamp arm to form a workpiece abutment for at least one workpiece, in which the first tool part is adjustable from a starting position into a working position by means of an adjustment device, wherein in the working position the first tool part or a functional element held on the first tool part either abuts against a workpiece supported on the second tool part or is spaced only a small distance apart therefrom, in which an actuating device is provided for applying a high processing power acting along the tool axis to the f
