This research aims at highlighting the structure of the secrets of the Qur’anic expression, by focusing on the features of the inimitability of the Quran dealt with by old scientists such as: Al-Jahiz, Al-Rummani, Al-Khattabi, Al-Baqillani, Abdul Jabbar Al-Hamdhani, Al-Jurjani, Judge Iyadh, Al-Razi, Al-Qurtubi, Zarkashi, Etc. In addition to what the contemporary scientists who were interested in the disclosure of these secrets which is harmonized and structured. Such as: Al-Aloussi, Al-Rafi’i, Abdullah Diraaz, Saeed Al-Noursi,Sayyid Qutb and Ibn Ashour.