Comminuted fractures usually take about three months to walk, the details are as follows: 1. Comminuted fractures are unstable fractures, requiring external fixation in plaster or internal fixation in incision, through the above treatment can keep the comminuted fracture relatively stable, the patient should cooperate with rehabilitation training, active contraction and stretching of the muscles around the fracture, to restore muscle strength and intensity, to provide external stability. 2. Patients with comminuted fractures usually reach relative stability in 6-8 weeks, and the fracture ends form a wide range of connections, but the patient cannot walk with weight, and can leave the bed without weight on the affected limb with double crutches to accelerate the blood circulation of the whole body and promote further healing of the fracture. It is necessary to wait for about three months to review the X-ray film to confirm the complete healing of the fracture before the patient can leave the crutches to walk normally and resume normal life.