Patella fracture will not usually rebound after treatment, but it is important to prevent postoperative infection. Patella fracture is caused by direct violence or violent contraction of quadriceps muscle leading to damage to the integrity of the patella, and is mostly characterized by localized swelling of the patella, pain, and inability to straighten the knee on its own. After patellar fracture surgery, systematic functional training for 3 months, usually will not rebound, but pay attention to the incision care to prevent postoperative infection. However, for serious patients or postoperative rehabilitation exercise is not timely, it may leave some sequelae. At the same time, do not go down to the ground and flexion/extension activities and exercises too early, otherwise it will cause secondary damage to the joint, which is not conducive to recovery. It is recommended that patients go to the hospital as soon as possible to receive timely treatment from orthopedic surgeons.