The philosophy of life and events after death has been one of the unattainable mysteries of mankind throughout the history of his life. All the thinkers of the world have spoken about it in some way, but they have all admitted that this issue has been and will be the most important unsolved mystery of mankind. Among the Islamic poets and philosophers, Omar Khayyam has addressed this issue more than any other poet or writer. The main essence of Khayyam's quatrains is the answer to this problem: showing the inherent inability of human beings to answer this riddle of existence; But is what Khayyam thought and wrote, innovative or original? The present article is an examination of the background of Khayyami's thoughts in the poetry of the world's classics. In this article, an attempt was made to show Khayyam's nineteen poetic themes regarding the philosophy of life and death, to show that before Khayyam, these ideas were raised in the works of poets of the world and were a common concern of poets of the past, and that What is called Khayyami's thoughts in the writings of literary critics of Iran is not unique to Khayyam, and their reference to Khayyam is accompanied by a kind of carelessness.
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