To the issue of the influence of the ancient Iranian and old Arabic law on the Islamic legal doctrine

The article considers the issues of communication between certain norms of the Muslim law with the provisions of the ancient Iranian and old Arabic legal systems. The author examines the fundamental differences between the forms of interaction of these legal systems and describes the reasons for these differences. Also the author focuses reader's attention on the importance of comprehensive studies of the mechanisms of interaction between social regulators in the framework of the legal system of the society.