Patellar subluxation is a relatively common condition in patients in clinical practice. The cause is mostly due to trauma, but a few are congenital. If the patellar subluxation is caused by acute trauma, conservative treatment can be considered, such as manual repositioning and fixation of the knee joint with a cast or brace. In the patellar area, topical ointment can be applied to promote blood circulation. If the patient’s patellar subluxation is habitual, it affects the patient’s normal life, normal walking and functional activities of the knee joint due to the patellar subluxation. In this case, the treatment should be surgical, which can be performed under epidural anesthesia for joint capsule tightening and suturing, and postoperative fixation of the knee joint area is also required. Therefore, in clinical practice, patients with patellar subluxation should seek timely medical attention and undergo proper treatment by a doctor to cure this condition as soon as possible.