Siraj al-Din Khan-i Arzu was one of the most significant literary figures of South Asia in the 17th-18th century CE, and had authored close to 36 written works in the field of research on Persian literature, such as stylistics (sabkshinasi), and introduced innovative ideas in various fields including stylistics, linguistics, rhetoric, poetic criticism, hagiographical writing (tazkira-nivisi), and others. One of his most important works is his tazkira titled Majma` al-Nafa’is. This work has not received the scholarly attention it deserves, in spite of its importance for literary studies. Khan-i Arzu was a highly knowledgeable litterateur, and he devoted serious attention to the issue of poetic style (sabk) and stylistics. In his own works, especially Majma` al-Nafa’is, he developed his profound opinions on the subject of poetic style. Although Arzu’s critical views on stylistics are mostly disconnected and scattered throughout the tazkira, they can be compiled into a distinctive set of opinions and in this way his approach to poetic style can be identified. Through a careful reading of Majma` al-Nafa’is and comparison with Khan-i Arzu’s other works, I have attempted in this paper to draw out Arzu’s critical views on various aspects of poetic style, in order to subject them to classification and analysis. Through doing so, I hope to open Arzu and his critical thought up for further study and entice other scholars to devote more serious attention to this important and often overlooked literary figure.