Children’s bones are growing and developing, and their physiological functions and biomechanical properties are constantly changing. Children’s bones are less likely to fracture and displace completely due to porous bone and periosteal hypertrophy, and the vast majority of children’s fractures do not require surgery, but when they occur near a joint, especially when they injure the growth plate, they often require surgical repositioning. Unlike adult bones, children’s bones will heal and correct themselves after deformity, but sometimes fractures that are not deformed heal with deformity and limb length, and some children have deformities due to damage to growth structures during surgery. In fact, most pediatric fractures can be repositioned, and sometimes a poorly repositioned fracture leaves a misalignment, and the child will correct the deformity on its own by virtue of its strong shaping ability, but of course it needs to be within certain limits. However, epiphyseal fractures and intra-articular fractures can cause deformity healing and disability if the diagnosis and treatment are delayed. There are three main causes of fracture: 1. Direct violence The direct action of violence on a part of the skeleton leads to fracture of that part, which often causes fracture of the injured part, often accompanied by varying degrees of soft tissue damage. Such as wheel impact on the lower leg, the impact of the tibiofibular stem fracture. 2, indirect violence Indirect violence through longitudinal conduction, leverage or twisting action to distant fractures, such as a fall from a high place foot landing, the trunk due to gravity relationship sharp forward flexion, thoracolumbar spinal junction vertebrae by the action of the folding knife force and compression fractures (conduction effect). 3, cumulative strain injury Long-term, repeated, minor direct or indirect injuries can lead to fracture of a specific part of the limb, such as long-distance marching prone to fracture of the second and third metatarsal bones and the lower 1/3 of the fibula backbone. This disease can be clearly diagnosed based on its clinical manifestations and X-ray examination, and no differentiation is needed. However, clinical attention should be paid to whether the fracture is a simple fracture or a pathological fracture caused by the patient’s own disease. In cases where the patient has a bone abnormality due to a pre-existing disease, a slight force can cause a fracture, which occurs more frequently in such cases and requires strict observation and diagnosis.