Annotation: In this article, we have reviewed the main challenges after the martial law period and the changes made to the pre-trial investigation of certain subjects. We have studied and reviewed the effective implementation of the problem and the prospects for conducting pre-trial investigations of individual subjects during martial law. We have identified the main measures in the criminal procedure legislation to ensure the standards of effective pre-trial investigation. After all, in difficult times of war, Ukraine stands as a symbol of invincibility, as it upholds natural values and basic principles of human existence. Since the beginning of the full-scale invasion of enemy troops on February 24, the number of such criminal violations has increased, but the issue of establishing fair punishment for such actions and pre-trial investigation in general is still a question. Therefore, the need to study this topic is due to the fact that active hostilities and the lack of access to the territory where the crimes were committed for law enforcement agencies of Ukraine cause problems at the stage of pre-trial investigation. The article examines the significance and importance of ensuring a uniform standard of evidence collection in relevant proceedings at the pre-trial investigation stage. Objective: to investigate the peculiarities of pre-trial investigation of certain subjects during martial law. Analysis of scientific sources: certain issues of the standards of effective pre-trial investigation have been the subject of scientific research by such scholars as I.V. Hloviuk, O.V. Kaplina, V.V. Kasko, O.P. Kuchynska, O.V. Lazukova, L.M. Loboyko, T.I. Fulei and others.