The article deals with the problems of online youth radicalization in modern conditions. It is indicated that soci-ologists identify a scientific problem as the absence in the Russian research field of a general theoretical and methodological concept of radicalization, especially online radicalization. The author of the article attempts a comprehensive systematic analysis of the phenomenon of online radicalization. Consequently, the article pre-sents a detailed methodology for the application of a systematic review literature in the study of online youth radicalization. The validity and advantages of using this method are pointed out. Based on the qualitative anal-ysis of the sources selected during the study, some approaches to the study of the phenomenon of online radi-calization are presented and analyzed. The necessity of conceptualizing the concept of radicalization, highlight-ing the risk factors of radicalization at various levels is revealed. One of the advantages of this work is the indi-cation of limitations that have been empirically identified and will be taken into account in future works.