Among the most pivotal events of the last century is the Islamic Revolution and the subsequent establishment of the Islamic Republic of Iran. This revolution, deeply rooted in authentic religious convictions and the doctrine of Mahdism, has significantly transformed public perceptions regarding religion, culture, governance, politics, economics, and overall lifestyle choices, owing to its civilizational and cultural essence. It has introduced a novel paradigm in Islamic governance that adopts a civilizational perspective towards global engagement. This discourse is based ongrounded in the authentic intellectual tenets of Islam and the ideal of civilization-building inherent in Mahdism. The civilizational discourse of the Islamic Revolution is characterized by specific features that Ayatollah Khamenei has eloquently articulated. Employing an analytical-descriptive method, this article examines the integral role of Mahdism philosophy in shaping civilizational discourse of the Islamic Revolution and highlights the manifestations of its impact. Inspired by the statements of the wise Leader of the Revolution, it considers the indicators of the discourse oriented towards Mahdism and enumerates religious sovereignty, revolutionary rationality, and social justice as the overarching attributes of the Islamic Revolution's civilizational discourse.