Relevance of the research topic. In the conditions of martial law, stricter requirements are put forward for the formation and implementation of the state's financial policy, transparency in financial relations. At the same time, the war provoked an increase in fiscal risks affecting the level of financial security of the country. The above conditions the implementation of a number of reforms in the financial sphere. The task of raising the quality level of the state's financial policy in the system of economic development and its tools became important. Formulation of the problem. The substantiation of directions for raising the quality level of the state's financial policy requires the use of a rational approach based on the duality of the tasks set before the state administration of Ukraine in the conditions of martial law: ensuring the proper level of financing of public expenditures and creating fundamental conditions for the support and recovery of the domestic economy. The development of provisions regarding the implementation of the financial policy of the state in the system of economic development will provide an opportunity to increase the degree of its adaptability to socio-economic processes. Analysis of recent research and publications. The problem of formation and implementation of the financial policy of the state in the system of economic development is quite widespread in scientific research. These are the works of famous domestic and foreign scientists: J. Keynes, P. Samuelson, J. Stiglitz, V. Tanzi, L. Lysiak, I. Lukianenko, A. Mazaraki, A. Nikitishyn, M. Pasichnyi, Yu. Radionov, I. Chugunov and others. Selection of unexplored parts of the general problem. The above-mentioned issues are actualized in connection with large-scale military operations on the territory of Ukraine, which lead to new extraordinary challenges for ensuring the country's financial security. Setting the task, the goal of the research. The tasks of the research are: to reveal the peculiarities of the implementation of financial policy in the system of economic development of the country in the conditions of martial law; carry out an analysis and assessment of the state finance system. The purpose of the study is to substantiate the strategic directions of financial policy in the system of economic development. Method or methodology of research. The article uses a set of scientific research methods: system approach, scientific abstraction, induction and deduction. Presentation of the main material (results of work). The features of financial policy implementation in the country's economic development system are revealed. The strategic directions of the financial policy of the state in the conditions of martial law are substantiated. Field of application of results. The results of the research can be used in the process of forming and implementing financial policy. Conclusions according to the article. Large-scale military operations in Ukraine pose threats to the provision of both the country's financial and national security in general: control over financial flows becomes more complicated, budget revenues decrease, etc. Modeling financial interrelationships, identifying their cause and effect, synergistic effects, should be the basis for raising the quality level of the state's financial policy in the system of economic development, restoring economic balance in the war and post-war periods.