For the springback problem of square rectangular welded pipes during the cold bending process, the cold bending process design was conducted by COPRA software to determine the process parameters suitable for the flexible manufacturing, and eight finite element models for cold bending were established by ABAQUS software. Then, the dynamic analysis and static analysis were performed to simulate the cold bending and unloading processes of sheet. Furthermore, the springback angles for each pass of the different models were obtained, and the influences of sheet thickness, sidewall height and forming width on the springback were studied by a single-factor analysis method at the same time. The results show that when the final forming angle is the same, the springback angle shows a trend of increasing first and then decreasing. Increasing the sheet thickness and forming width, and reducing the sidewall height could lead to the decrease in the springback angle of each pass in the cold bending, and the springback angle is linearly related to the sheet thickness. During the cold bending process of the bending angle 2, the equivalent stress of sheet in the width direction remains basically unchanged, and there is no springback phenomenon in the bending angle 1.