In the 1950s, Russian orthopedic surgeon G.A. Irizarov (llizarov) discovered through long-term experiments and clinics that human bones, like connective and epithelial tissues in the human body, have great regeneration and plasticity, and doctors can make the bones grow or shorten according to their wishes to a certain extent by mastering their development and growth rules and using certain medical means, thus making it possible to “regain” fingers and toes lost due to trauma. The doctor can make the bones grow or shorten according to the doctor’s wish, so that the fingers and toes lost due to trauma can be “recovered”. He has also been working on the correction and repair of certain congenital defects and acquired deformities in the human body. He spent more than ten years on in-depth research of techniques and theories, and finally developed the tension-stress law of retractive tissue regeneration. It was widely used in clinical practice in the 1950s, and the technique cured a large number of patients with severe bone diseases caused by World War II, for which Professor ilizarov was awarded as a national hero and received the Order of Lenin, the highest Russian state award, four times, and was considered by Russians as a national hero, gaining great honor and reputation in the world of medicine. Russian ilizarov Medical Center belongs to the Russian National Academy of Sciences, and its orthopedic technique and the doctrine of distraction osteogenesis have been hailed by the international orthopedic community as a new milestone in the history of orthopedic development. This famous technique was also named as llizarov technique after Mr. llizarov. To date, the llizarov technique remains the most advanced orthopaedic technique in the world. In 1965, Prof. Illizarov’s inventions were officially recognized by the relevant authorities of the former USSR, and the President of the USSR awarded him the titles of Hero of Socialist Labor of the USSR and Meritorious Doctor and Meritorious Inventor of the Russian Federation, and he was elected as a member of the former USSR Academy of Sciences in the 1980s. In 1982, Yi was invited to the Italian AO Association to make his first academic presentation in a western country, which attracted great attention from the Italian orthopedic community. At the second Irizarov Technical Symposium held in Italy in 1984, Prof. Miiller, the president of SICOT and the founder of AO, gave high praise and called him the Michelangelo of the history of orthopedic surgery. Irizarov has been invited to lecture in Italy, Spain, France, Switzerland, Brazil, the United States, Japan and other countries, so that Irizarov’s theory and technology quickly spread to Europe, America and developed countries in Asia. After Irizarov’s invention was exhibited in Tsukuba, Japan in 1985, medical practitioners around the world praised it as a miracle in the history of medicine. Professor Kurokawa, president of the Japanese Orthopedic Society, led several delegations to Russia to study Irizarov’s theory and techniques (bone lengthening and heightening) and to promote their application in Japan. In 1997, Irizarov’s theory and technique was designated as an orthopedic tutorial by the American Academy of Orthopedic Surgery. In the early 1990s, Irizarov’s theory and technique became generally accepted in western countries, and developed countries such as the United States, Germany, France and Japan have established societies for the study and application of Irizarov’s method. At present, the western orthopedic community generally considers the Irizarov theory and its application techniques (using Irizarov bone lengthening and augmentation) as one of the milestones in the history of orthopedic development in the 20th century, and so far Irizarov techniques have restored the health of millions of people with trauma and limb deformities and limb defects in more than 50 countries in the world. The essence of biomechanical theory application – Llizarov technique: The law of tension-stress is a biological theory discovered by Ilizarov in the 1960s through numerous experimental studies on animals: “Biological tissues subjected to slow, continuous stretching to produce a certain tension can stimulate the regeneration and active growth of the tissue in the same way as fetal tissue, all in the same cellular mitosis”. The technique is referred to as distraction osteogenesis or distraction tissue regeneration. Because the configuration and technical characteristics of Ilizarov 3D instrument can meet the treatment requirements of various limb deformities, it is especially suitable for the correction of severe limb deformities. llizarov technique is also a minimally invasive external fixation technique; the application of some new techniques and products such as combined external fixator, limb dynamic elastic synchronous lengthener and internal and external combined limb lengthening system, to a certain extent, represents the level and progress of bone external fixation in China. The level and progress of bone external fixation in China. We treat complex fractures, congenital hip diseases, tibial pseudo-joints, foot deformities, bone discontinuity, bone defects, infected fractures, joint stiffness, O-leg, X-leg, dwarfism, dwarfism and upper limb shortening deformities. It has unique effects in traumatic orthopedics, orthopedic orthopedics and limb lengthening, with the advantages of less trauma, better results, shorter operation time, less pain and lower cost, which in some aspects cannot be compared with other methods. Contribution of Ilizarov technique in medicine 1. Ilizarov technique is a milestone in the history of bone orthopaedics (bone lengthening) surgery and has promoted the development of modern medicine. The Ilizarov treatment system is led by its biological and bioengineering mechanics theory, under the operation of clinical standardization, so that the external fixator plays a perfectly integrated functional role, generating the stress of distraction and compression, making the bone end fixed and stable, and constantly stimulated by the above-mentioned stress, making it produce physiological compressive stress in the tissue, all these stresses stimulate the action of local tissues to make them regenerate, develop and grow, and All these stresses stimulate the local tissues to regenerate, develop and grow, and enhance the active and vigorous shaping function; coupled with its anti-infection and less disturbance of blood flow, the procedure ensures that bone healing and functional recovery go hand in hand. It solves the medical problems that cannot be solved by other traditional treatment methods and is promoting the development of minimally invasive surgery such as augmentation, bone lengthening, plastic surgery, maxillofacial, vascular and neurosurgery. 2, Irizarov invented a new external fixator to reduce the pain of the patient and greatly reduce the cost of treatment. It has all-round adjustment, de-angle, de-rotate, de-lateralize displacement and axial compression in accordance with biomechanical requirements, and can be slowly drawn and lengthened without secondary incision to take internal fixation, no electrolytic reaction and internal fixation disadvantages, no stress masking early activity weight-bearing, and low treatment cost.