In order to reduce the overall weight of pipeline systems and increase available space, the application of small bending radius pipes is becoming increasingly widespread. However, in free bending forming technology, forming small bending radius pipes is more difficult. Based on ABAQUS finite element simulation, this paper establishes a finite element model for the free bending forming of small bending radius pipes, analyzes the free bending forming process of small bending radius pipes, and forms pipes with a relative bending radius less than 2 by adding additional bending moments. The effectiveness of the finite element model is demonstrated through experiments. By means of finite element simulation and free bending test verification, the corresponding relationship between the process parameters of the pipe for free bending die forming and additional bending moment forming and its forming radius was obtained. The experimental results show that, the minimum relative bending radius achieved by the bending die is 2.07. By increasing the additional bending moment for forming, the minimum relative bending radius can be reduced to 1.75.