Poetry is the fruit of speech, the most artistic use of the vocabulary of the language, and it was known as "weighted words rhythmic" in one of its most common definitions, and it was very interesting by writers and critics, but historians and human scholars as well. Poetry was the basic tool that ancient Arabs used to preserve and record their human and literary heritage. And between the two books of this book; "Muhammad Mandour" tells us at length about the general theory of poetry, in terms of its philosophical basis and its basic ingredients, since its crystallization during the reign of Greece, and then by explaining the definition of Arabic poetry, and its development over its historical periods from the pre -Islamic era to the twentieth century, also explaining its most important features And its schools.