The article is the first to propose distinguishing the Slavic stage from 1921-1937 in the interwar period of the life of Luka Lutsiv . Until now, literary studies have been concerned with the literary and ideological identity of L. Lutsiv in the 20-30s of the twentieth century as a Vistnykian, Dontsovian, and it has been occasionally noted that the scholar also tended to an ethical, "Catholic" approach in his research methodology. Luca Lutsiv also presented himself as a knight of the "Red Viburnum", that is, a representative of the military generation of the Ukrainian Sich Riflemen, and interpreted his own scientific activity as a way of fighting Bolshevism, and in general as a new round of his own national liberation struggle. Such national and existential attitudes of Luka Lutsiv determined the way of thinking and analytics in his Slavic studies.From this perspective, the author systematises the relevant biographical facts and literary heritage marked by a distinct Slavic trend in the study of the Taras Shevchenko phenomenon. Here, ideologically and methodologically, Luka Lutsiv is in solidarity and consonant with the scientific research of Jan Mahal and Stepan Smal-Stotsky. It is concluded that in the studies "T.