Writing preludes and praises in Persian literature is as old as prose-writing. In other words, praise-writing has existed since the emergence of the first prose texts. Examples include the preludes of books such as Shahnamehey Aboumansouri, Alabniah a’ n Haghaegh-el-Adviyah and Sharh-ot-Taarrof. The prelude presents a perfect image of the subject, style, the reason for authoring the book, and the life, thought and social conditions of the era of the author. Carried out in a descriptive and content analysis method, the present study, analyzes the most eminent prose texts in Persian written in the 6th, 7th and 8th lunar centuries of Hijrah from a stylistic point of view with a focus on linguistics and content issues. A survey of the structure of the preludes show what components the writers have had in mind and how they have acted with regards to the main axis of the work, expression manner, thought and literary style. Based on the findings of this paper, the preludes in the works of the 6th, 7th and 8th lunar centuries of Hijrah are generally classified into two categories: one is the praises in Arabic including praise of God, His Traits, and the praise of the Prophet, His apostles and His family; the other is the praises in Persian including the name of the man of letter, the king of the time, his praise, prayer for his long life and eternity of his kingdom or Ministry ending eventually in the introduction of the book chapters. Preludes and praises are a gate to the text and understanding the content of the work. Depending on the art and capability of the work author, they can be effective in expressing the opinion and thought style as well as verbal and spiritual style and intellectual concerns of the author. The most important features of the preludes and praises in Persian are rhythm and other figures of speech as well as lengthening and allusions from Quarn and Hadis.