Textual linguistics aims to delve into the description, analysis, and linguistic study of textual structures, as well as the study and analysis of the various aspects of forms of textual communication. Based on the above, the text should not only be studied and analyzed in terms of its linguistic structure, but rather it should be studied in terms of an interactive context between one addressee and another, which is considered an important matter. Harmony is one of the mechanisms of textual linguistics that links the major parts of the text in its deep structure, and the poem "Dejlah Alkhayr"by Muhammad Mahdi Al-Jawahiri is one of the best and most beautiful poems, and it is worth delving into its deep structure to reveal the semantic relationships inherent in it. This is in the poem "Dejlah Alkhayr" by Muhammad Mahdi Al-Jawahiri, with an analytical-descriptive approach, aiming to demonstrate the aesthetic harmony in this lengthy poem. the results of the article indicate that incitement is one of the mechanisms of harmony that tighten the text's nakedness between the title and the discourse, the most important of which is in this poetic text, and the extent of harmony is due to the presence of this mechanism in the text. The major structure, which is one of the purposes of harmony, and is the desired significance in the open reading of the text, influenced by the saying of "Van Dyck", had an active presence in this poetic text.