This article discusses studying of Mavardi’s work «Al-ahkom as-sultoniyya va-l-valoyot ad-diniyya» the oriental state governing and political – legal doctrine. The main aim of «Al-Ahkom as-sultoniyya va-l-valoyot ad-diniyya» was reforming of public problems and enrichment of political rights by comprehensively proved doctrines. The given work acquired the status of the constitutional doctrine, the legal doctrine for the Abbasids state in ХI century, and carried out function of the basic aid on the subjects of statehood and political rights.