In this research, we dealt with the modern Khalili theory and its relationship to generative grammar, because we found a similarity between what Dr. Abd al-Rahman Haj Saleh, one of the readers of Heritage al-Khalil (may God have mercy on him), in Sibawayh’s book, and the construction of his Khalili theory and Chomsky’s propositions and theories in his generative theory. through which he seeks to build a holistic syntax that includes human languages, and since the towards Al-Khalil transmitted in Sibawayh’s book is in itself a general theory about which you can say that it is suitable to be a comprehensive syntax for all human languages, so Al-Khalil and his student Sibawayh adopted their grammatical concepts in general, And if their interest is in Arabic grammar, because it is towards their language, but when we look at the foundations of the rules and concepts we see that they are mostly suitable for the rest of the languages, and the best evidence for this is that all modern grammatical theories that appear from time to time, we find that they have clear evidence in the direction of Al-Khalil and Sibawayh. Hence the idea came to link the basic concepts mentioned by Dr. Abd al-Rahman Haj Saleh in his Khalili theory and the generative theory as the latest grammatical theory that appeared in our time, and we have shown in these papers the similarities between the concepts in the two theories.