Fractures near the elbow joint are common in growing children, especially in children 5 to 10 years of age. Supracondylar fractures of the humerus are the most common, accounting for 75% of elbow fractures; improper early management can lead to forearm osteofascial compartment syndrome and the formation of Volkmann contracture resulting in lifelong disability. In the past, closed repositioning was used, and it was only possible to maintain the repositioning after successful fixation with a cast in extreme flexion, which often resulted in re-displacement during or after the operation of cast fixation, so the success rate was low and caused great confusion to the treatment. Surgical repositioning by incision will cause great pain to the child and is prone to complications such as vascular nerve damage and joint dysfunction, and will leave permanent scars on the skin. The application of closed reduction percutaneous pinning technique in children with supracondylar humerus fractures is a major advancement in treatment. The advantages of this method are: the pin is firmly fixed, which meets the requirements of minimally invasive surgery and avoids the damage to soft tissues that affects the joint function; the trauma is small, which can protect the local blood circulation and is conducive to fracture healing; it is not easy to occur elbow inversion deformity; it can be used for early functional exercise; and it is a good method for treating pediatric supracondylar humerus fractures because the child suffers less pain and has a shorter hospital stay.