Although the Western origin of nationalism has been emphasized in recent centuries, the social interactions of nationalist sentiment between individuals have existed since the past and are essentially cultural. Nationalism can be proposed with a negative and positive approach. This research, with a positive approach, descriptive-analytical method and library collection, has examined the functions of Iranian nationalism in Azeri-populated areas. Language, land, common culture or a sense of belonging to a community and the like have always been a driving force and influential in strengthening and developing the positive dimension of nationalism. Reza Shahi's project attempted to revive the ancient values ​​of pre-Islamic Iran. The combination of ideology and religious beliefs with Iranian nationalism in Azeri-populated areas created different capabilities and functions compared to other societies, which is inconsistent with its anti-religious approach. Expressing hatred of foreigners, confronting the occupation, opposing the Azerbaijani invasion, opposing the Russian-British agreement, resisting the occupiers, taking a stance on the arrest of Imam Khomeini (RA), opposing the legislation of provincial and provincial associations, joining Mossadegh's national movement, and supporting the Islamic Revolution are among the functions of Iranian nationalism that have been built as a result of education, behavioral and cultural interactions, social connections, and interpersonal interactions of individuals in the communities. The research findings also indicate that positive dimensions of nationalism have been built in the Azeri-populated areas. In a way that it took on an anti-authoritarian form against internal tyranny and was built with a focus on preserving Iranian unity and identity.