In recent years, more and more people suffer from bowlegged. The appearance of bowlegs not only made them lose their beauty, but also deeply impacted their self-confidence. Sometimes they feel inferior and even dare not go out of the house. However, the arrival of the bowlegged orthosis made them see the beauty and hope. Bowed leg correction before understanding the correction method of arched leg, we must first understand what is arched leg. Bow leg, medically known as genu varum and external splayed leg, also known as "X leg", medically known as genu valgus, is a common deformity in China. Especially teenagers, the incidence rate is higher. If young men and women get this kind of lower limb deformity, they will not only lose their physical beauty, but also walk badly. Sometimes, it will affect their participation in the army and work, thus affecting their love. Some of them will become depressed and even pessimistic. Bow leg, medically known as genu varum and external splayed leg, also known as "X leg", medically known as genu valgus, is a common deformity in China. Especially teenagers, the incidence rate is higher. If young men and women get this kind of lower limb deformity, they will not only lose their physical beauty, but also walk badly. Sometimes, it will affect their participation in the army and work, thus affecting their love. Some of them will become depressed and even pessimistic. The main cause of "O" leg and "X" leg deformity is rickets in children. A few are sequelae caused by cartilage development disorder, fracture, trauma and osteoma. When children suffer from rickets, due to the lack of calcium salt, the cartilage of epiphyseal hyperplasia can not be ossified normally, and the original bone is decalcified and absorbed, and the bone becomes soft and cannot tolerate gravity. In addition, the ligaments around the knee joint relax and lose the support and protection to the bones, so the calf bones bend and deform, and "O" and "X" legs appear. In recent years, external fixator combined with inverted U-shaped osteotomy of tibial tubercle has been applied to plastic treatment of "O" and "X" legs in China and achieved good results. The advantages of this new treatment mainly include: osteotomy is simple and safe, bone healing is fast, and it is not easy to delay healing. The use of external fixator is convenient to master the angle of plastic correction, which can make the angle of bone healing accurate and convenient to adjust; Patients can move on the ground during the treatment, and the muscles of lower limbs will not atrophy. According to statistics, the complete correction rate of deformity can reach more than 96%.