Based on the results of the research the following conclusions were formulated: 1) martial law in Ukraine has a direct impact on the unified state civil protection service, causes the presence of features of its functioning, as well as checking the state of readiness of services and forces that perform civil protection tasks; 2) in Ukraine, the bodies, services, forces of civil defense function simultaneously in two legal regimes: martial law and a particular period with a degree of complete readiness. In addition, the so-called “reconstruction period” is foreseen, which determines the additional tasks of the unified state civil protection service, the full implementation of which is possible after the end of hostilities and is actually implemented in the territories controlled by Ukraine and where there are no combat clashes; 3) the peculiarities of the functioning and diagnostics of the services and forces that perform civil defense tasks during the steam regime of martial law include: an increased degree of threats and risks due to missile attacks, kamikaze drone attacks, attacks from various types of weapons, and subsequently rescuing people from under rubble, liquidation of other consequences of destruction; a limited deadline for completing tasks; the need to restore critical infrastructure facilities related to the provision of electricity and gas supply as a result of rocket attacks; carrying out the evacuation of the civilian population in the zone of active hostilities; the presence of emergency situations with a wide variety of consequences, including those of a potentially man-made nature, which have a cross-border impact on neighboring states both in the short and long term.