The inability to bend the leg after one year of patella fracture is mostly due to the lack of postoperative functional exercise, post-traumatic adhesion of the tissues around the knee joint, etc. It is necessary to clarify the cause of the cause of the disease and then carry out targeted treatment, which can be treated by exercise, acupuncture, tuina, surgery and other methods. The impaired flexion and extension activities after patella fracture may be caused by muscle atrophy after surgery or removal of external fixation without timely functional exercise. You can recover through the knee flexion and extension exercises, gradually increase the range of flexion and extension, increase the degree to the knee joint does not feel pain is appropriate. It can also be combined with acupuncture, massage and other treatments to speed up the recovery. If it is due to post-traumatic adhesion of the tissues around the knee joint, the local adhesion can be loosened by treatments such as small needle knife. In addition, degenerative changes in the knee joint, knee synovitis and other diseases can also lead to knee flexion and extension activities, can take non-steroidal anti-inflammatory drugs such as diclofenac sodium and other treatments. One year after the patella fracture can not bend the leg on the life of a greater impact, it is recommended to timely medical treatment, follow the doctor’s instructions.