After patellar surgery, generally through standardized functional exercise, it does not cause steel nail internal fixation breakage. Patellar fracture surgery is often taken to steel nail fixation, which is conducive to maintaining the stability of the fracture, especially for some comminuted patellar fracture, which is more conducive to the recovery of the fracture. Generally after the patellar fracture steel nail fixation, within four weeks should pay attention to rest, avoid moving the joint, to prevent the fracture displacement. After four weeks after the fracture can be reviewed by X-ray. If the fracture broken end of the bone scab has been initially formed, you can gradually carry out the knee joint flexion and extension activities to prevent joint stiffness. In one to three months after the patella fracture, you can gradually go down to the ground to carry out weight-bearing activities, in order to promote the recovery of the knee joint function. The steel nail can be removed about one year after the fracture to avoid causing the nail breakage and the reaction of foreign body. After patella surgery to avoid premature weight-bearing exercises, as long as the functional exercise under the guidance of the doctor, the steel nail will not pull off. Exercise during the discomfort symptoms should be timely medical treatment, so as not to delay the condition.