Concrete-bar straightening-cutting machine which is adequate for straightening cutting coil rod or cold drawn steel bar. Operating installation is simple, easy to repair, high level of automatically, high speed to straighten, with figures- recorded and figures- control functions. The machine uses roller curve roll the direct way to apply 3 hot thinking with ribs (thread) Steel, cold with ribs (LO lines) Steel, it also can be used to cut off the ordinary steel plate.