Ibn Hazm is famous for his intellectual productivity and knowledge. He contributed to the development of Islamic legal thinking, especially in the field of Ushul Fiqh. Through a range of works such as al-ihkam fi Ushul al-Ahkam, he demonstrates his expertise in the field, using styles like no other scholars. This article examines the ideas of Ibn Hazm, employing a combined method of history and descriptive analysis. The article finds that Ibn Hazm refuses the use of ra'y such as qiyas, istihsan, mashlahah mursalah, sadd al-dara 7 and ta 'Urn al-ahkam in Islamic legal theory
