For a connecting transmission part, aiming at the problems of poor quality and short service life for product forged by curvent process, the forming process of forging was simulated by Deform 11.0. The results show that although the formging shape of forgings is complete, the metal convection phenomenon appeares in the pre-forging process, resulting in the formation of folding defects, which affectes the forming quality of forgings. For this reason, the shape of pre-forgings was improved, and two schemes were designed. Then, the forming simulation verification of pre-forging and final forging were carried out respectively, and the forging forces of the two processes were compared. The research shows that the improved scheme can improve the metal flow and solve the folding problem caused by convection. In addition, scheme 2 requires less forging force and can reduce the load of mold. Finally, the forging test was carried out based on scheme 2. The forming appearance of the obtained connecting transmission part is good, the forging streamline of cut-off section is continuous, there is no metal folding defect, and the inspection of each dimension is qualified, which meets the process requirements.