Walking good weight 2 and a half months after tibial plateau arthroscopy after knee fracture is mainly considered to be related to the decline in muscle strength of the lower limbs, restricted knee joint activities or poor local blood circulation. 1. Decrease in muscle strength of the lower limbs: after tibial plateau arthroscopy after knee fracture, it is necessary to brake and rest in the early stage, so it is easy to have the problem of muscle atrophy of the lower limbs, resulting in a decrease in muscle strength, which will trigger the feeling of walking heavy for 2.5 months. 2. Restriction of knee joint activities: after the knee fracture is treated by surgery, if the problem of soft tissue adhesion inside the knee joint occurs, it is easy to affect the range of activities of the knee joint, so it is easy to appear the phenomenon of walking heavy in the process of walking. 3. Poor local blood circulation: Knee fracture is a local structural change, easily accompanied by the surrounding tissue damage, so after surgical treatment, in the process of braking easily affect the local blood circulation, and later in the process of walking will lead to the symptom of walking heavy. It is recommended that the patient should have a review in time, pay attention to brake and rest in the early stage after the surgical treatment, and gradually carry out the functional exercise in the later stage, and the specific recovery needs to be carried out under the guidance of the professional physician.