Abu al-Hasan 'Ali ibn Muhammad al-Bazdawi () (c. 1010-1089 A.D.), known with the honorific title of Fakhr al-Islam (the pride of Islam), was a leading Hanafi scholar in the principles of Islamic jurisprudence. He is author of the acclaimed Kanz al-Wusul ila Ma'refat al-Usul (), popularly known as Usul al-Bazdawi, a seminal work in Hanafi Usul al-Fiqh.
'Abd al-Qadir ibn Abi al-Wafa' al-Qurashi (d. 775/1373) has praised him in his Hanafi biographical dictionary, Al-Jawahir al-Mudiyya fi Tabaqat al-Hanafiyya ().
His most famous book is Kanz al-Wusul ila Ma'refat al-Usul (), popularly known as Usul al-Bazdawi, which is a seminal book in Hanafi Usul al-Fiqh and was a standard teaching text for centuries.
In this work, he focuses on issues such as rules and methods of determining a variety of sources and methods for making the right decision and discourses on rules of working with texts, and so on. The Uzbek Academy of Sciences has more than a dozen copies of this work.
The book has generated numerous commentaries, the most popular of which being Kashf al-Asrar () by Abd al-'Aziz al-Bukhari (d. 730/1329).
His other works include:
He also wrote on Tafsir (Qur'anic exegesis).
Al-Bazdawi studied under Shams al-A'imma 'Abd al-'Aziz al-Halwani (d. 456/1064) who was also a teacher to Al-Sarakhsi.