In this article, for the first time in modern literary criticism, the structure, content, themes and ideological and artistic features of Saadi's "Bo’ston" have become the subject of deep and comprehensive research, the principles, reasons and sources of Saadi in the creation of this work have been identified, the place of Saadi and his "Bo’ston" in history has been determined Persian-Tajik literature. This topic has become the subject of our article, taking into account the latest achievements in the study and analysis of the texts of classical Persian-Tajik literature in Iran, Tajikistan, Russia and other countries.