The article analyzes the unique personality of the XX century, the outstanding Soviet orthopedic surgeon-Gavriil Abramovich Ilizarov. The evolutionary process of the formation and development of the Ilizarov method in traumatology and orthopedics at the domestic and world level is shown. The undeniable advantages of the external fixation system developed by Ilizarov are revealed. The design of the Ilizarov compression-distraction apparatus is considered. Being familiar with G.A. Ilizarov, the author shares his memories about him, describes the biological and mechanical features of the influence on the bone and other tissues of the Ilizarov system, which has become a classic and internationally recognized in the treatment of patients with fractures, pathological conditions of the musculoskeletal system, congenital and post-traumatic orthopedic deformities of the limbs.