Abstract: The forming process of no-step-end workpieces was simulated with the software DEFORM-3D. The influence of processing parameters on the end scrap of no-step-end workpieces was analyzed by means of quadratic quadrature rotate combination design method to get a regression equation. According to the obtained research results, the end scrap is in direct proportion to the length of blanks, but in inverse proportion to the spreading angle. A smaller spreading angle is beneficial under the selected range. Finally the reliability of the regression equation and the correctness of the influence rules were verified by rolling experiment.