The article stipulates the need to neutralize explosive devices and explosive subjects with the help of special equipment, special services and units, both law enforcement agencies and military specialists. It is analyzed the peculiarities of the structures and technical characteristics of the hydro-destroyer for the destruction of explosive subjects. Both existing samples of hydraulic cannons and new developments of hydraulic destructive devices are considered, which effectively work with the destruction (neutralization) of explosive devices located in hard-toreach places or have enlarged overall dimensions. As an example, the article describes the new developments proposed by the scientists at the National Academy of Internal Affairs, which are patented as a useful model and have advantages over existing developments. The article also gives a brief description of explosives and their properties when the temperature of the environment changes and when exposed to them in the body and without the body. In the study of hydraulic destructors, special attention was paid to the possibility of safe destruction of explosive devices in hard-to-reach places. This article can be useful for both practitioners and scientists. The analysis made in the article encourages the improvement of existing hydro-destroyer technical means and the development of new ones, taking into account their use in the investigation of criminal offenses committed with the use of explosive devices.