The principle of fracture treatment is: “reset, fixation, functional exercise”. Why is functional exercise considered so important? This is often not understood by many orthopedic patients and their families, and is often not taken seriously. We know that the ultimate goal of orthopedic trauma treatment is to make the injured part recover normal function as soon as possible. The measures of medical care are also centered on this purpose. No matter the rectification and fixation or surgical treatment, they are only the initial treatment work, even if the fracture is healed, it is still far from the functional recovery of the injured limb. In order to achieve this goal as soon as possible, it is necessary to carry out scientific and various forms of functional exercises under the medical staff to make the patient reduce complications, heal smoothly and resume work and life as soon as possible. Some people use “three points of treatment, seven points of exercise” to describe the functional exercise, it can be seen how important the functional exercise of orthopedic patients, so what is the significance of functional exercise?