The constitution of the Islamic Republic of Iran, as the highest legal document of the country, is the basis for the preparation, formulation and writing of other laws and defines the principles of political, cultural, economic, foreign relations, structure and limits of political power and guarantees the rights of citizens. Objectives: In this research, it is tried to examine the fundamental principles of the constitution in the area of the nation as the principle of equality of people in the constitution of the Islamic Republic of Iran. Method: Descriptive-analytic method. Results: The constitution, as the result of the Islamic Revolution of the people of Iran, led by Imam Khomeini (P. B. U. H), urgently paid special attention to the fundamental rights of the people and people of Iran, emphasizing the principle of equality and equality of people against the law, the granting of privileged and unlawful privileges to the class or A certain group of people has been forbidden. Conclusion: The results of this study indicate that, unlike most systems in the world, all people of the society are equal to the constitution of the Islamic Republic of Iran in terms of the inclusion and enforcement of the law, and, after forty years since the victory of the Islamic Revolution, this equality and equality are more than Considered beforehand and based on available documentation, violators of laws without political and social considerations are being treated equally and decisively by regulatory agencies.