This paper examines the controversial disagreement among schools of Arabic syntax; according to which, the syntactic components and rules classified and investigated thoroughly. The research tries to answer the following questions: What is meant by controversial disagreement on syntax? And what are the reasons behind it? What is the true nature of syntax schools? What are their types? What are the negative and positive impacts of that controversial disagreement? The paper traces back the controversial disagreement on Arabic syntax and defines its advantages. There are several previous studies dealing with this question, however; this research paper examines the linguistic and terminological aspects of that disagreement among schools of Basrah, Kufa, Baghdad, Andalusia, and Egypt. Despite their disagreement, the syntax schools have one aim: serving the syntax and keeping it flawless. Through this paper, it is attempted to present all these aspects. It concludes and confirms that disagreement on syntax among grammarians is a normal issue, which confirms the fact that syntax is flawlessness. Thus, one can say that having different viewpoints does not necessarily harm syntax; however, it makes it more solid and flawless. Furthermore, the disagreement among the syntax schools has positive and negative impacts in enriching Arabic syntax.