Forging is a process of forming metals which leads to the deforming of work piece through its pressing. Shape and the number of pre-forms are the most significant issues in designing the process of closed die forging. The criteria for producing the pre-forms are creating a faultless die, fully the die completely, and homogenous deformation. In this study simulation in the designing the forging process of connecting rod via Pro/Engineer software and optimization of pre-form die and its analysis through the use of SuperForge software were investigated. Concerning the results, the simulation forging of connecting rod, power and energy of each phase and the effects of other significant factors such as temperature can be explored.