INTRODUCTION. In Uzbek literary criticism, the term “zullisoinayn” is used for poetry created in two languages. At one time, Alisher Navoi was a bright example of such creativity. The relevance of the study is due to its connection with the development of this literary tradition in the work of modern Uzbek poets. At present, the poetic technique of “zullisoinayn” of bilingual poets' poems makes a significant contribution to strengthening literary ties and the development of Tajik literature in modern Uzbekistan. The purpose of the study is to identify the significance of the work of Tajik poets in the development of the technique of “zullisonain” as a literary phenomenon that developed in the Middle Ages and has survived to this day, which is a symbol of literary friendship.MATERIALS AND METHODS. Using historical-descriptive, comparative and analytical methods, the specific feature of modern literary life in Uzbekistan is described. The research material was the works of famous poets, whose life and creative work are connected with modern Uzbekistan.RESULTS AND DISCUSSION. An analysis of the factual material showed that the tradition of “zullisoinayn” is actively developing in the works of bilingual poets who write poems in the Persian-Tajik and Uzbek languages, especially after the Republic gained independence.CONCLUSION. The poetic style “zullisonayn”, as an indicator of the traditions of national literature, is a symbol of the literary and cultural friendship of the Tajik and Uzbek peoples living in harmony on earth, and an indicator of the creative enrichment of both peoples, which is reflected in such phenomena of modern literature as literary bilingualism, poetic linguistic personality.