in the second half of the twentieth century, when the avant-garde proposed truly revolutionary principles for organizing the sound environment, not only the treasures of ancient Russian church music were rediscovered, but also the interest in Russian spiritual culture as a whole, including musical folklore, significantly increased. Russian society at the end of the century was engulfed in disbelief, disappointment, fatigue. Hence there are images of the “decaying” world, the end of the world. The apocalyptic situation manifested itself not only in the fire of civil wars, but also in the feeling of disharmony of people with themselves and with others. As a result, domestic culture began to return to the fold of universal human values, eternal problems and traditional ideas about peace and good. This article considers the basic principles of the implementation of musical folklore in the vocal and instrumental works of domestic avant-garde composers of the second half of the twentieth century. It is noted that neo-folklorism, which arose in domestic music in the 1980–1990s in connection with the idea of national revival, through the semantics of rite, cult archaic, means of folk musical language, strengthened the Russian roots of domestic culture and strengthened the national philosophical heritage embedded in folk music.