The indications for surgery for supracondylar humerus fracture are as follows: 1. Type III supracondylar humerus fracture, the fracture end has been completely displaced, there is no stability, almost no periosteum, no cortex, almost no periosteal connection support at the fracture end, the fracture end is extremely unstable, conservative treatment will lead to deformed healing of the fracture end, which may produce a series of sequelae and complications and have a relatively large impact on the growth and development of children, so surgery is needed Treatment; 2. Type II supracondylar humerus fracture, if the medial end is compressed or rotationally displaced, surgery is recommended, otherwise the fracture will easily heal with an inversion deformity of the elbow joint, affecting the appearance and function of the upper limb; 3. Some after conservative treatment, the broken end is displaced again with unsatisfactory results, resulting in poor alignment of the fracture end, surgery is recommended to avoid a series of complications.