A comminuted fracture of the thigh that has not healed in seven months may be related to factors such as delayed healing, malnutrition, and the severity of the fracture. 1. Delayed healing: it is one of the common performance of the recovery process of the fracture, and it is still not healed in 3~6 months, partly related to poor fixation, poor bone quality and poor development and other factors. 2. Malnutrition: some fractures can be caused by osteoporosis, and after comminuted fracture, the requirement for bone growth is higher, and if the nutrition is poor and the bone growth is unsatisfactory, a similar situation will occur. 3. Fracture severity: Even for the same comminuted fracture, different results may be produced according to the degree of bone fragmentation. If the bone itself is severely comminuted, it will take a relatively long time to recover, and the need for a second operation may not be ruled out. It is recommended that the patient should have a review in time to identify the cause of the disease and have it treated in time.