The issue of existence and proof of coherence in Ferdowsi's Shahnameh is the main issue of this research. In fact, Ferdowsi's use of authentic modes of expression, which is consistent with his epic genre and theme, is to such an extent that it disrupts the dualism of structuralist myth-poetry. This is one of the unifying theories of the philosophy of modern art, namely: the philosophy of art by Croce, in fundamental elements such as: "intuitionexpression", "art identity".-Language, "the inseparability of pure and fine expression" or the principle of "genuine way of expression", as well as in his definition of "art" as "the manifestation of matter in the form" are also well represented. Therefore, based on the most important elements mentioned in the philosophy of art of Croce, the present study comparatively analyzes the artistic unity in Ferdowsi's Shahnameh by concluding with an analyticaldescriptive approach and concludes that: Ferdowsi's Shahnameh, in addition to its various forms of textual and structural cohesion, also enjoys artistic and aesthetic cohesion, which, in comparison with other epic poems before and after it, has the greatest degree of compatibility of affect and meaning. (Subject) with its construction and face. This adaptation or appropriateness in the Shahnameh has been clearly exaggerated in the literary ways of exaggeration, contradiction, and metaphor.