Introduction. Increasing the quality level of implementation of the State Budget of Ukraine requires a systematic approach in view of the importance of the development and adoption of mutually agreed decisions of financial and budgetary institutions under martial law. Problem. It is important to ensure dynamic budget balance, take into account the principles that determine the basic model of the budget regulation mechanism in the conditions of large-scale military operations, which significantly influenced the change in the trend of economic development. The aim of the paper is to identify the main principles of implementation of the State Budget of Ukraine under martial law. Methods. Complex analysis, scientific generalization, comparison and analogy; specification, generalization of theoretical and practical material, sampling; scientific abstraction, induction, deduction and dialectical, abstract-logical, economic and statistical methods were used in the paper. Results. The role of the State Budget of Ukraine in ensuring the financial and budgetary security of the country was defined. The peculiarities of the budget toolkit were revealed. An analysis and assessment of revenues and expenditures of the State Budget of Ukraine was carried out. The author developed approaches to the use of financial and budgetary tools and substantiated strategic directions of the budget policy of Ukraine under martial law. Conclusions. An effective revenue mobilization mechanism is an important prerequisite not only for increasing budget revenues, but also for restoring economic balance in the country. At the same time, under martial law, considerable attention should be paid not only to the task of ensuring an effective mechanism of revenue mobilization, but also to the observance of the principles of fairness of taxation, related to the rational redistribution of the level of tax burden among taxpayers. Important tasks of budget policy are to increase the efficiency of budget expenditures and ensure a balance between financing the most critical items of the state budget and stimulating the recovery of the economy.