Abstract: Purpose of current investigation was to improve the arthroscopy technique of patients with osteoarthritis of knee, by introduction of complex clinic and diagnostic algorithm. Materials and methods. The investigation was carried out on the basis of 218 patients data of the clinic of Sport traumatology department of Republican Scientific and practical medical Centre of Traumatology and Orthopedics during 2014-2018 yy. with osteoarthritis of knee of different degree (0-IV st.) by Kellgren and Lawrence classification. All patients were carried out 5 types arthroscopic operations depending on the stage o morphologic alteration, that based to development of clinic and diagnostic algorithm. Results were studied at nearest (3-6 months) and long term (6 months - year) periods. At postoperative period to patientsmedications, early rehabilitations and physiotherapy were recommended. In our data, in 96,5% were positive results. Conclusion. Arthroscopy with using of clinic and diagnostic algorithm is allowed to rise of share good results, to activate of patients and to begin of early rehabilitations at postoperative periods.