This article is devoted to the study of the role and place of the collaborationist auxiliary police, which was an important part of the Nazi security forces during the occupation of Soviet territories. The reasons for the appearance and genesis of such police formations are shown on the example of the Belarusian SSR. Their typology is considered, with the help of which it was possible to establish that the main types of police in the territory of this Soviet republic were the «service of order», «self-defense» and Auxiliary Police of order, the reasons for the creation of which directly depended from the increase in the level of partisan danger in the occupied territories. As a result of the conducted research, it was found that the auxiliary police were the most massive collaborationist formations in the occupied Soviet territories, and their role in Nazi repressive policies (for example, participation in the Holocaust) is quite significant. Nevertheless, the level of combat capability of the police remained low for a number of reasons and only decreased with the course of the occupation, which forced the Nazi administration to look for other forms of military collaboration. One of these reasons was the interethnic relations on the territory of the Belarusian SSR, which allows us to call the auxiliary police an essential factor in the dynamics, for example, of Belarusian-Polish and Belarusian-Russian relations.