The article examines the model of public administration in the field of national security that meets the requirements of martial law. The purpose of the study is to determine the format of the existing public administration in the national security sector, taking into account the challenges of the legal regime of martial law by solving such research tasks as outlining the essence of public administration in the field of national security; research of subjects endowed with administrative powers in the field of national security; determination of the directions of transformation of public administration in the specified area. The research methods are the method of analysis, the method of observation and study of documents, the method of comparison, the method of modeling, and logical methods. As a result of the conducted research, the expediency of Ukraine taking into account the directions of reforming managerial influence on public relations in the field of national security, which are recognized at the level of the European Union, is substantiated. As a condition for the implementation of the necessary changes in the regulation of the security sphere, it is separated from the sphere of defense and the introduction of appropriate changes to the Law of Ukraine "On National Security". The specifics of the institutional support of social relations in the field of national security are identified and the directions for the implementation of the proper doctrine of national security are outlined.