In order to reveal the reasons of bending and torsional deformation for hinge steel during the finished product rolling process and air cooling process, and seek the optimal rolling process parameters combination for the effective control of the torsional deformation of the finished product, a  finite element calculation model of deformation during the rolling and air cooling process for hinge steel after rolling was established, the influence laws of roller diameter configuration, hole deflection angle of hole neutral line relative to horizontal line, opening rolling temperature, motor speed, cooling water temperature and other major rolling process parameters on the torsion deformation of the finished product were explored, and the combination of rolling process parameters to ensure the minimum torsional angle of the finished product was determined. The results show that the torsional deformation is mainly produced in the hinge steel during the final pass rolling process, and the bending deformation is mainly produced during the air cooling process after rolling, which finally results in obvious bending and torsional deformation of the finished product. The roller diameter configuration and hole deflection angle have significant influence on the torsional deformation of the finished product. The upper roller radius and hole size are unchanged, the lower roller radius is reduced by 15 mm, the neutral line of hole is deflected to the horizontal line by -3.2°, and the torsional angle of the finished product is close to 0°. Therefore, the suitable rolling process parameters combination by finite element analysis can effectively control the bending and torsional deformation of hinge steel, namely.