Rehabilitation treatment for patellofemoral chondral joint injury, according to the severity of the disease using conservative treatment, physical therapy or surgical treatment, and rehabilitation training under the guidance of rehabilitation physicians. 1. Conservative treatment: For patients with mild cartilage injury, non-steroidal anti-inflammatory drugs (e.g. diclofenac sodium, celecoxib, etc.) can be used to reduce inflammation and alleviate pain; articular cartilage nutrients (e.g. dextrose, chondroitin sulfate, etc.) can be used to slow down the degeneration of the articular cartilage and alleviate the pain and swelling of the joint. In addition, the use of protective gear can be used to protect the knee joint and maintain the stability of the patella. 2. Physical therapy: Physical therapy such as magnetic therapy and infrared therapy can be used to promote blood circulation in the knee joint, reduce inflammation and improve pain and swelling. 3. Surgery: If the cartilage is seriously damaged, surgery can be used to promote the repair and correction of deformity, so as to improve the function of the knee joint. 4. Rehabilitation: For patients with conservative treatment, it is necessary to limit the strenuous activities of the knee joint for 1 to 2 weeks, and avoid kneeling, squatting and other actions; for patients with surgery, they can generally move the adjacent joints, such as toes and ankles, etc., and then decide the time of normal activities according to the recovery of the condition after discharge from the hospital. After the condition is stabilized, the training of knee joint periphery and hip muscle groups can be strengthened under the guidance of the rehabilitation physician. In case of patellar chondromalacia injury, a reasonable treatment plan should be formulated after the professional doctor evaluates the condition, and the patient should not arrange the training on his own, so as not to cause secondary injury to the patellar chondromalacia.