With the Islamic Revolution of Iran, new political forces emerged, influenced by the circumstances of the revolution. After nearly three years of conflict between Islamist, liberal, and Marxist political forces, the Islamist forces ultimately defeated the liberal and Marxist forces and established Islamic discourse in the country, and the process of Islamizing laws began. Now the question is, how was Islamic penal policy established? The hypothesis is that with the dominance of the discourse of Islamists over other forces at the level of society, the discourse of the Islamic revolution dominated and the ground for the establishment of Islamic penal policy was provided. In this research, by using the descriptive-analytical method and collecting materials in the way of library study, we will analyze the issue in two parts. The first part: the predominance of the discourse of the Islamic revolution over other discourses, and the second part discusses the establishment of the Islamic penal policy. The findings show that with the victory of Islamic discourse and the consolidation of Islamic penal policy based on jurisprudence, important developments such as new criminalizations, new punishments, new criminal measures and rules entered the penal code.Although Iran's pennal policy is still evolving, its desirable transformation is in the light of the deep expertise of the effective components of the discourse of the victorious political factions in order to prevent the approval of inappropriate laws.