Patients can not bend the knee joint, according to different situations, to take different measures, specifically rehabilitation training, traction treatment, as follows: First, rehabilitation training: knee extension device adhesion, the patient is a knee trauma, such as fracture, dislocation, surgery, or sprain after the use of plaster, splint, brace fixed for a long time, not able to flex, is the occurrence of knee extension device adhesion, that is, the quadriceps muscle, etc. The muscles are adhered together due to the accumulation of blood, and can be restored through active activities, such as squatting, leg presses or massage, paddle and tendon manipulation, etc. Second, traction therapy: joint gap narrowing, degenerative joint cartilage, joint edge osteophytes, joint gap narrowing, the patient’s knee joint can not be bent, traction therapy is needed, the hospital traction with calf traction belt, once 30 minutes, 1-2 times a day, along with the knee joint local herbal fumigation, hot compresses, physical therapy, acupuncture, can gradually This can be improved gradually.