Left supracondylar humerus fracture is more serious, left supracondylar humerus fracture may cause joint deformity, neurovascular ischemic necrosis, osteofascial compartment syndrome and other serious consequences if not treated in time. Supracondylar humerus fracture is one of the more common types of elbow fracture in the clinic, mostly seen in children, often occurring after trauma, manifested as pain, swelling, restricted movement, deformity at the elbow joint, etc. Untimely treatment may lead to elbow exostosis, elbow inversion deformity, neurovascular injuries, osteofascial compartment syndrome and other serious complications. For patients with supracondylar humerus fracture, clinically the general choice of manipulation external fixation method for treatment, its method is simple, less invasive, but for the failure of manipulation external fixation of the patient can also choose surgical treatment, the treatment still need to carry out rehabilitation training. It is recommended that the patient should consult the doctor in time and follow the doctor’s instructions.