The party structure in third world countries, due to the underdevelopment of the masses of the people, can be a suitable structure for the political development of these countries. Iranian society also did not find enough opportunity and maturity to form strong political parties during the constitutional era, and during the Pahlavi era, parties went to the margins of the country's politics and had no role. The Islamic Republic Party, as the most important political party in revolutionary Iran and rooted in the ideals of this revolution, played an important role in institutionalizing political participation and stabilizing the system, especially in the 1980s. This article, using Huntington's theoretical framework of "political institutionalization" and the research method of "institutional studies approach", sought to analyze the issue of how the Islamic Republic Party was able to apply the process of channeling the political participation of citizens in the revolutionary system in order to stabilize the system. The findings of the study showed that the Islamic Republic Party was able to play an effective role in the process of stabilizing the Islamic Republic system and overcoming crises and obstacles that destabilized the system, such as internal counter-revolution, remnants of the former regime in the administrative apparatus, and marginal, divergent parties by intellectually uniting the revolutionary political elites in one party, preventing the dispersion of votes in different factions in the three branches of government, and following the policies of Imam Khomeini (RA) as the charismatic leader of the revolution and the factor