A review of the literature on one of the methods of treatment of unresectable primary and metastatic liver cancer, namely radio embolization, is presented. A detailed description of the procedure for performing radioembolization of the liver vessels, possible complications, indications and contraindications to this method, lists the necessary equipment and tools. Particular attention is paid to the description of the microspheres used in radioembolization. A modern review of clinical studies, including those still unfinished, devoted to the method of radioembolization with unresectable primary and metastatic liver cancer is given.