Praise be to Him who has the reins of all things in His hand, and directs them as He wills. He is the doer of whatever He wills. If He wills something, He only says to it: “Be,” and it is. Glory be to Him, His speech is free from any word or letter. His names are sanctified, His attributes are sublime, and His actions are the eyes of wisdom And prayers and peace be upon the unlettered Prophet, the most eloquent of those who spoke the Arabic language: Muhammad, His servant and Messenger, and upon his family and his brothers among the Messengers and Prophets, the lamps of guidance and the beacons of salvation, and those who followed their example and emulated their guidance As for what follows, the Arabic language is the most abundant of the world’s languages in terms of words, and its ability to absorb clear words. It is one of the Semitic languages. The Arabic language is a universal human language, and its words and expressions have different meanings. It is one of the languages that is distinguished by a grammatical, morphological, and phonetic system; It carries a rich cultural heritage and expresses the cultural identity of the Arab nation, which distinguishes it from other nations. . Among the most important sciences of the Arabic language are rhetoric and its divisions, grammar, morphology, synonymy and antonymy, derivation, prosody and rhyme. As for my study of this language, my research dealt with (grammatical and morphological issues in the book Al-Ibana by Salama bin Muslim Al-Awtabi). The importance of this research lies in clarifying the status of this great scholar who has been overlooked by studies, and in his treatment of grammatical and morphological issues that are the essence of the Arabic language, and in extracting this treasure scattered between the pages of the book Al-Ibana. Although this book is a dictionary, these issues have taken their share from this great scholar, which are rich in explanation and detail for students to benefit from and are an aid to the reader in understanding the rules of the Arabic language and standing on the issues of grammar and morphology found in the book Al-Ibana. In the first section, my study dealt with an introduction to Al-Awtabi, his name and lineage, his personality, his birth, his upbringing, his scientific status, his family and its political status. I also mentioned his most important works. I also touched on his book Al-Ibanah and the most prominent features of his method in it. I mentioned the reason for writing this book. I also talked about the description of the book, the number of its volumes and pages, and the content of the book’s chapters in its four parts. In the second section, I talked about grammatical and morphological issues, and I touched on the most important of these issues, which is the issue of beginning with an indefinite noun, which is one of the issues that has attracted the interest of many scholars. I also talked about the issue of raising the noun and predicate (by “kana”) and mentioned some aspects of “lakan” among scholars. I also addressed the issue of the function of “in” with the deleted present tense verb. I also talked about some morphological issues, including describing the masculine with the feminine form, the issue of dualizing and pluralizing the verb, and the issue of what is dualized, singular, and intended for plural. In conclusion, I hope to God that I have succeeded in this research and that students of the Arabic language will benefit from it