A fractured knee usually takes 8-12 weeks to recover, as follows: 1. Short-term braking: A fractured knee is usually an incomplete fracture, and the stability of the fracture end is relatively good, so only short-term braking of the knee joint is needed, usually 4-6 weeks, after 4-6 weeks, the fracture end will have a large amount of bone scabs through, and the fracture will gradually heal. 2. Functional exercise: It is not until 8-12 weeks when the X-ray is taken that the fracture disappears completely. -The patient’s pain, swelling and other clinical symptoms will be fully relieved, and the patient can walk with normal weight and resume normal life. At the same time, the patient should strengthen the exercise of the leg muscles so that the atrophy of the leg muscles can be improved and the normal joint movement can be gradually restored when walking with weight. Therefore, a knee fracture will generally recover completely in 8-12 weeks and, in general, will not affect the patient’s future life and sports.