Abstract: The two structures of the beam of the skew-roll straightener frame before and after the optimization are analyzed by means of a math model of the beam as especially established,and relevant Finite Element software. As a result,it is proved that detailed data concerning the displacement and stress distribution as inside the said beam in the straightening process can be obtained via relevant simulation process. Such data will be used as basis for design of the said cast-welded beam,and proper arrangement of the stiffening bars so as to ensure rigidity and strength of the straightener frame.