The Shiite Marjaʿiyya, with its non-governmental nature, traditional financial autonomy, and social influence, has long played a crucial role in Iran’s societal transformations.This research analyzes the socio-cultural functional transformation of the Marjaʿiyya after the Islamic Revolution, focusing on the evolving dimensions of its authority and institutional position. The central issue is to understand how the establishment of the political system based on the Wilayat al-Faqih and post-revolutionary developments have influenced the nature of the socio-cultural functions of the Marjaʿiyya. The question is: What effects have the structural mechanisms that emerged in the post-revolutionary period had on the authority and the nature of the socio-cultural functions of the Shiite Marja'iyya? The hypothesis argues that after part of the Marjaʿiyya entered the official governmental structure, its institutional position in socio-cultural realms has changed. This matter has laid the groundwork for structural challenges to preserve traditional independence in its core functions of independent arbitration, educational roles, and the guidance and spiritual leadership of society. This research employs an analytical-comparative methodology to examine the transformation of the Marja’iyya’s socio-cultural function across two distinct periods: pre- and post-Islamic Revolution. The findings show that changes in funding sources for certain Marāji, the integration of judicial and arbitration roles into state institutions, and the formal restructuring of the public sphere have collectively challenged the Shia Marja’iyya’s socio-cultural autonomy, leading to an erosion of its symbolic capital. These developments have produced significant difficulties in maintaining the traditional integrity of the Marja’iyya institution and its comprehensive societal position.