The purpose of this scientific work was to determine the tactics of treatment depending on the degree of osteoarthritis and the characteristics of the disease. 196 patients with different severity of osteoarthritis and osteoarthrosis of the knee, treated in the department of Sports Traumatology of RSSPMC TO in the period from 2014 to 2019 were included in the study material. All patients underwent standard examination methods. Patients were treated with surgical methods according to our proposed 5 types, depending on the severity and characteristics of the disease, in addition they received physiotherapy and exercise therapy. The results of treatment were evaluated by the Lysholm score taking into account certain indicators with the summation of the ball scales. In the majority of patients (188 patients), an improvement in the condition of the knee joint was noted. Only in 4 patients after the arthroscopic intervention, a short-term remission occurred for only a few months, which was associated with the severity of the pathological process - osteoarthritis IV stage. The use of an individual approach depending on the severity and characteristics of the disease and the complex treatment of gonarthrosis is reasonable with many benefits and positive consequences in the postoperative period.