Elbow valgus of 20 degrees occurs in patients due to both congenital genetic factors and acquired secondary factors. For example, when a fracture occurs, the fracture end heals abnormally, and the elbow turns out to be deformed. In this case, if the elbow valgus 20 degrees occurs in children, the treatment can first consider conservative treatment, through traditional Chinese medicine techniques to correct, and then wear the elbow valgus corrective support for fixation. If elbow valgus occurs in adults, surgical treatment can be considered, which can do supracondylar wedge osteotomy of the humerus, the osteotomy should be given to the plate or Kirschner’s pin for internal fixation, and after the operation, it is also necessary to carry on the support or plaster cast fixation. The patient is then given oral bone grafting medication to promote early healing of the fracture. In addition, at the early stage of elbow fracture healing, early elbow functional exercises should be carried out to prevent elbow function from stiffness or recurrence of elbow valgus.