The object of research: Kharkiv organization of the CP (b) U as a component of the institutions of the political system of Ukraine. Investigated problem : The article depicts the process of transformation of the party organization of the Communist Party of the Bolsheviks of Ukraine of the Kharkiv province into a totalitarian organization. Main scientific results: From the very beginning, Communist Party of the Bolsheviks of Ukraine of the Kharkiv province was created as an undemocratic organization. But in the early 1920s, the internal party life of the party organization was characterized by some features of democracy. After the civil war, some communists demanded greater freedom of criticism, the initiative of the masses, and the fight against bureaucracy, but the opposition in the party organization, in contrast to the all-Union center, did not have an ideological platform. They were dissatisfied with the low financial status of ordinary communists and the privileges of the party nomenclature. The party apparatus resisted attempts to democratize party life, and ordinary communists were unable to resist this process. As a result, the party organization of Kharkiv region was transformed into a totalitarian organization, which was characterized by unanimity, intolerance of criticism, strict centralization, lack of election, powerlessness of ordinary members and uncontrolled power of the party apparatus. Field of practical usage of research results: determined by suitability for use in the field of the modern state formation by politicians, parties, public organizations, state institutions, and the media. Innovative technological product: on the basis of numerous archival materials, many of which are introduced into scientific circulation for the first time, a significant gap has been filled in the ideas about the process formation of totalitarian principles of internal party life at the regional level, namely in Kharkiv region. Field of application of innovative technological product: the practice of forming, implementing and improving the system of state regulation by politic parties.