In general, the walking limp of comminuted patellar fracture is considered to be caused by postoperative traumatic arthritis, joint adhesion and other factors, which can be treated with physiotherapy, medication, surgery and other methods. 1. Traumatic arthritis: it is one of the main complications of postoperative comminuted patellar fracture, it should reduce the weight bearing of the joints, avoid excessive activities, and the joint pain can be prescribed oral nonsteroidal anti-inflammatory drugs such as ibuprofen, meloxicam, etc. If the symptom is obvious and the conservative treatment is ineffective, it is feasible to use the surgical treatment such as arthroscopic cleanup surgery. 2. Joint adhesion: If there is no good functional practice in the early stage, or if the cast is immobilized for a long period of time, it may cause joint adhesion and sclerosis, as well as limitation of activities. Positive functional exercises should be carried out under the guidance of doctors to prevent muscle atrophy and adhesion of the surrounding soft tissues, leading to joint stiffness. Physical therapy such as hot compresses and magnetic therapy can also be used to relieve muscle contractures and adhesions. It is recommended that patients with comminuted fracture of the patella who walk with a limp should seek timely medical treatment, identify the cause of the disease and carry out targeted treatment under the guidance of the doctor.