In order to further improve the quality of forgings, a six-linkage mechanism was designed, in which the upper and lower linkages were driven by triangular toggle to complete the movement of slider, and the kinematics model was given. The weighted sum of improved dimensional conversion function was used as the objective function, which effectively overcame the defect that the weighting factor was difficult to choose, and the optimal scheme was constructed, which provided a reliable guarantee for meeting the engineering usage requirements. A multi-linkage parameters were designed for the drive system of forging machine with six-linkage mechanism, and the engineering academic constraint parameters of mechanism were constructed based on the comprehensive analysis of the drive structure, movement performance and cold and warm forging process conditions of forging machine. The results show that only the maximum acceleration is the same after the optimization, and the other parameters are significantly improved after the optimization, so that the forgings with better quality can be made. After the slider optimization, the displacement and velocity curves change more gently, and the return trip time is significantly shortened. The six-linkage transmission structure effectively improves the operation stability of forging machine. The research is easy to be applied and popularized, and has certain significance to improve the forging efficiency.