Children are in the process of continuous growth and development, the reason why they grow is that the growth plate epiphysis exists between the bones, if the child’s epiphysis is also nailed on with a steel plate or easily surgically cut open and reset, as in the treatment of adult patients, the child’s bones will never grow again, resulting in shortened limbs, such as one leg long and one leg short, or resulting in angular deformity of the bone joint, that is, the proverbial bone is crooked. 1. 1, children’s bone strain shaping ability, thick periosteum, fracture often one side of the periosteum to maintain continuity, comminuted fractures and open fractures than adults. 2, children’s bones are very strong natural repair healing ability, very few fractures do not heal. The majority of children’s post-fracture bone discontinuity occurs in the incision and repositioning, improper application of internal fixation, and is mostly a medical complication. 3, children’s bones have a good shaping ability, even if the fracture can not be completely reset, within a certain range can be adjusted through growth and development to restore, will not affect the function. Surgical repositioning may cause children to grow short legs The epiphyseal growth plate in children is a weak zone in bone mechanics, and its strength is significantly lower than that of the joint capsule and ligaments. Therefore, there are significantly more epiphyseal injuries than joint capsule ligament injuries in children. Epiphyseal injuries are a problem unique to fractures in children. Therefore, incisional repositioning should be avoided as much as possible without affecting fracture healing and bone function. Only fractures involving joints and epiphyseal growth plates require more precise repositioning; or in cases where closed fracture repositioning has failed and the position is difficult to stabilize after repositioning, surgical incision is required. Fracture “shaping” determines functional recovery Fracture repair in children takes a long time. Fracture healing in children is divided into three processes: the inflammatory phase, the repair phase, and the contouring phase. The inflammatory and reparative phases are completed within 3 months, while the plastic phase takes 3 to 6 months or longer to complete. Plastination of fractures is important for the recovery of bone function. Factors that affect fracture contouring include the patient’s age, the location of the fracture, and the direction of fracture angulation. The younger the patient, the closer the fracture is to the joint (the epiphysis of the bone), the greater the ability to shape. In some fractures in children, even if there is a large displacement, bone function can eventually be restored if good plasticity is maintained.