This study discusses the traditional syntax through receiving sama') and analogy (giyas) in explaining Al Mufassal by Ibn Ya'ish. It shows the important role that these two aspects played in standardizing the rules and structure of Arabic grammar, and their role in enriching the language through semantics by increasing the vocabulary, supported by of a variety of quotations as evidence, The importance of the study is that it focuses on the interpreter's sources of receiving and his method of using a variety of proofs to support his views on the correct grammar usage. Through this, the study shows that Ibn Ya'ish was not a reformer but mostly a follower of other grammarians. Yet, he had an independent attitude in choosing his grammatical structures and guided his students toward them. Although he acknowledged many of Sibawayh's views, he also had his disagreements with him, which reflects his independent attitude. The research found that Ibn Ya'ish had a great respect for the sources of receiving, and he had played a great role in stabilizing the syntactic structures in accordance with the way they were used by traditional Arabs; he said that no alteration can be done without solid reference to traditional syntactic structures. As for analogy, Ibn Ya'ish had great respect for it and considered it a pillar of grammar roots because it enriches the language and helps its development. The study discusses his position in relation to different and contradictory grammar indications, and explains his method of determining the more acceptable ones.ibn Ya'ish was faced by a huge amount of controversy among proofs and had to choose the more acceptable ones. The study demonstrates the effect of logic and philosophy on the methodology of Ibn Ya'ish. This is shown through his views and comments; he justifies his criticisms of some views in a logical manner, like, for example, building a justification on the frequency of usage. His views on diminution, elimination, syntax rules, among other views, show his logical inclination and reliance on disputation in order to reach a proof; an example of this is his use of Allal al-thawani wa al-thawalith). Finally, the study was concluded with the most important findings that the researcher reached through Discussing Ibn Ya'ish's attitude toward receiving and analogy, and the controversy of grammar indications.