The article is aimed at analyzing the content of the intelligence and operational work of the Soviet special services, which they conducted among the Pentecostals of Ukraine during the late Stalinism (1944-1953). Research methodology is based on a combination of general scientific (analysis and synthesis); method of inductive and deductive logic) and special historical (historical-logical and system-structural) methods. The scientific novelty of the research lies in the author's attempt on the basis of little-known or first introduced into scientific circulation, documents on the work of anti-religious units of the NKGBGB to highlight the content of their work among the Pentecostals of Ukraine during the late Stalinism (1944-1953). The conclusions. In the period of late Stalinism, the Pentecostal religious unions of Ukraine, as in the pre-war years, remained the object of the operational development of the Soviet special services. The reason for this was the features of Pentecostal doctrine, "mysticism" ("spiritual" baptism and glossolalia) and pacifism, which did not fit into the atheistic-rationalist pseudo-scientific Marxist-Leninist model of "ideal" communist society. Due to the change in the paradigm of state-church relations in the USSR caused by the Second World War, the NKGB-MGB bodies were also forced to change the methods of their work in the religious sphere, in particular in relation to the Pentecostals. Unable to legalize religion in the USSR to eliminate the religious unions revived during the German occupation by administrative and operational means, the NKGB-MGB bodies went to the cunning and decided to eliminate them by joining the Evangelical Baptist Union of the Supreme Council of the ECB, controlled by the Soviet special services. For the implementation of this plan, the Soviet state security agencies for eight years used various agent-operative combinations, combined with outright repressive measures (in fact, large-scale operations) aimed at adjusting the religious palette of Ukraine and joining the Pentecostals to the Supreme Council of Europe. However, they all proved insufficient because they did not lead to the complete unification of the Pentecostals with the Baptists. This circumstance allowed the leaders of unregistered Pentecostals, after the death of Stalin and their release from the camps, to continue work on the creation of their own union and to register it in the Soviet authorities separately from the Supreme Council.