Niẓāmī Gandjawī’s “Ḵosrow o Širin” the poem is one of the most prominent works of genius and fiction in Persian literature. Although the articles on the structure of the narrations of this poem have already been written, But in using rhetorical instruments to persuade the audience and, as a result, to suspend, No particular research has been done on this fiction. In this article, First, we have defined the persuasion in various sciences and its role in the history of philosophy and rhetoric And then a brief glance at the definition has been suspended to clarify how rhetorical practices can serve to suspend the story. Suspicions in the story of Khosrow and Shirin are largely the result of the poet's use of the rhetorical techniques used to persuade the audience. This suspension, which in fact causes the coward and the distance between lover and beloved at different intervals of the story And on the other hand, it creates expectations in the reader, there are many stories in different sections. In this article, two sciences of meaning and expression have been used to examine the role of persuasion in creating suspense. It was enough from the meanings of science of meanings only to the secondary meaning of the word, namely encouragement, perseverance, warning, blame and blame, and reverence and bow and from expressions to similarities, metaphors, and parables, because their role and effect seem to be more tangible to achieve the desired result.