Rehabilitation training after knee fracture needs to be carried out in accordance with the phases of early rehabilitation, middle and late rehabilitation. It mainly includes knee joint mobility training and muscle strength training as the main content. 1. Early rehabilitation: anti-inflammation and pain relief, removal of edema, prevention of venous thrombosis, muscle contracture and other complications are the goals. (1) Immobilize the fracture site by plaster, brace or surgery and elevate the affected limb. (2) Active movement of non-fixed joints, full-range joint movement, ankle pump movement, etc. to maintain the mobility of each joint and prevent contracture. (3) Physical factor therapy: infrared rays, ultra-short wave therapy or low-frequency magnetic therapy can be used. 2. Middle and late stage rehabilitation: focus on improving knee joint mobility training and muscle strength training to promote the recovery of limb motor function. (1) Restoration of joint mobility: according to the order of passive movement, assisted movement and active movement in the direction of each axis of movement, as well as joint loosening, gentle stretching contracture, adhesion of the tissues. The movements should be smooth, gentle and rhythmic, so as not to cause obvious pain. (2) Muscle strength training The knee flexion and extension resistance training can be completed according to the active and resistance training to improve the muscle strength. (3) Standing and walking training, with assistance or crutch support. Gradually carry out graded weight-bearing exercises, gradually increase the standing training of the lower limbs as well as dynamic and static balance training, including one-legged standing. It is recommended that the patient seek medical advice and rehabilitation training under the guidance of a rehabilitation doctor in order to avoid delaying the condition.