The research aims to demonstrate the Islamic investment formulas in managing public debt in the Kingdom of Saudi Arabia and their importance through the issuance of Islamic instruments in the forms of Salam and Istisna'a as models for these tools. The research concluded with results, the most important of which are: The government’s strategy for managing public debt proved that it resorted to public debt in order to bridge the budget deficit, and one of the most prominent results is also the pos...