This article analyzes the significance of the work of Muhammad Haidar Dulati "Tarih-i Rashidi" as a source of medieval history, covering a period of two hundred years from the XIV century to the middle of the XVI century. Not only the events of Muhammad Haidar Dulati's "Tari x-i Rashidi" and the stories he heard from various people, but also the works of many eminent historians, geographers, and the tracts of the Sufis. za r a u da ry p, o la rdy mo ly na n paida langa n.The history of the book is based on the books and manuscripts of many historians who lived before him and in the law. Where there is a need to skip. Mr. Khaydar's "Tarih-i Rashi di" is a classic example of the use of classical history, literature, and memoirs. Speaking about the sources, the authors of these works, the directors of their lives, the essence of their works, M.Kh. The article also analyzes the reasons for the use of these documents.