The research focuses on the Lors and presents the definition and explanation of the concept of national identity, the elements of Iranian national identity and the attachment of the Lors to the Persian language component in the Pahlavi era(1921-1979). There are living the various language groups in Iran, these groups have a constructive and prominent role in solidarity and strengthening national identity. The Lors are very similar to Persian in terms of language and dialects, and in terms of population dispersion and residence in more than eight provinces of the country, and historically and culturally consider themselves Iranian. The existence of Iranian views of Lors, the identifying elements of Islam and Shiism, Persian language, history and land of Iran caused them to play an active and influential role in various issues of Iran. Lors with the most efficient Persian language tools; Among the lasting masterpieces of Ferdowsi, Saadi, Hafez, Nezami and Rumi in the richness and the spread of Persian as a supra-dialectical language in Iran and the language of communication and interaction of Iranians played a great role in national solidarity. In the Pahlavi era, the Persian language was considered as a stable component of identity building and consciously for conducting administrative, official and scientific correspondence. The study examines the role of Lors in strengthening national unity in Iran, in the form of the hypothesis "Lors along with local Lori dialects using Persian as the official language of correspondence, administrative system, education, national and colloquial written works and sources, a fixed role "They have had national unity in strength. "; Therefore, according to the nature of the subject, the research is descriptive-analytical and the method of data collection is library, documentary and Internet.