A 28 year old rotund leg can usually be corrected with surgery. A 28 year old rotunda is already an adult rotunda deformity. Conservative treatment is generally ineffective and surgical correction is required. Surgery is not recommended for asymptomatic rotator cuff deformity because it does not affect normal life and there are certain risks associated with surgical treatment. If there is pain in the inner side of the knee joint, which affects normal life, surgical orthopedics is required. In the operation, the proximal tibia is partially interrupted and propped up, and autogenous bone is implanted to correct the inversion deformity and the lower limb force line, and it is fixed with steel plate and screws, and walking on the ground after two weeks. After one year, the plate was removed. The surgery is effective, not only to correct the deformity, but also to relieve the patient’s symptoms. Loop leg patients, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.