To easily install a desired work cutting metal mold in a cutting work machine from these by previously preparing several kinds of work cutting metal molds having a fixed blade corresponding to a shape and the size of various works.

A pressurizing device 5 having a freely reciprocating ram 15 is arranged in a main body 3 of a cutting work machine 1, and a turret 21 is rotatably arranged so as to pass through a forward position in the advancing direction of the ram 15 of the pressurizing device 5. Plural work cutting metal molds 11 composed of a moving blade 13 freely mountable on and demountable from the tip of the ram 15 and a fixed blade 27 to cut a work by cooperating with this moving blade 13, are arranged in a radial shape in a radial part 25 of the turret 21. When the turret 21 rotates, a desired work cutting metal mold 11 of the radial part 25 of the turret 21 is easily transferred to the pressurizing device 5, and the moving blade 13 is automatically installed on and connected to the ram 15. A work is inserted between the fixed blade 27 and the moving blade 13 of the work cutting metal molds 11, and the ram 15 reciprocates by the pressurizing device 5, and the work is reliably cut by making the moving blade 13 and the fixed blade 27 cooperate with each other.