Knee adhesion bending difficulty can be relieved by physical therapy, manipulative release surgery and surgery. 1. Physiotherapy: Long-term inactivity after knee injury will lead to adhesion of soft tissues and cause bending difficulties. In order to improve the adhesion situation, the soft tissues around the knee joint can be treated with physical therapy such as wax therapy and ultrasound therapy to soften the tissues and loosen the adhesion, so as to alleviate the difficulty in bending with adhesion of the knee joint. 2. Manipulation: After the adhesion of the knee joint, under the guidance of professional clinicians, the knee joint can be loosened by manipulation, i.e., pushing the patella up, down, left and right through appropriate intensity of manipulation within the tolerance range of the patient, and then kneading around the knee joint to relax the muscles and fascia, but pay attention to gentle manipulation to avoid ligament injuries caused by excessive weight. 3. Surgery: When the adhesion of the knee joint is serious, and the adhesion and bending cannot be improved even after a certain intensity of manipulation, surgery under knee arthroscope is needed to remove the synovial tissue inside the knee joint, so as to reduce the adhesion. Therefore, it is recommended to go to the hospital to find out the extent of the adhesion and bending difficulty of the knee joint, and then to carry out the appropriate treatment.