Calf fracture of eight or nine years old boy can reach clinical healing in about one month, and the factors affecting the healing are age, health condition, local factors and so on. 1. Age: Fracture healing varies greatly by age. Adult calf fractures usually take about three months, while eight or nine year old boys can achieve clinical healing in about a month. 2. Health status: Poor health status, especially with chronic wasting disease, significantly prolongs fracture healing time. 3. Local factors: The healing time varies depending on the type of fracture, with faster healing for larger bone section contacts and slower healing for smaller bone section contacts. As well as the richer the blood supply of the fracture site, the faster it heals and the slower it heals. Fractures in the healing period should pay attention to nutritional supplements, do not carry out strenuous exercise in order to avoid affecting the healing of the fracture, the specific should be carried out under the guidance of the doctor, pay attention to the care, in order to avoid accidents.