The posterior fibular talofibular ligament should be the posterior talofibular ligament, and the injury will lead to ankle swelling, pain, and impaired activity. 1. Rest and braking: patients need to stop activities immediately after the injury, ice packs, pressure bandages, while elevating the affected limb to facilitate swelling, the use of crutches to assist in activities, and can not walk under the ground weight. 2. Physical therapy: after 72 hours of injury, you can apply local hot compresses, use infrared rays, ultrasonic waves to promote blood circulation, anti-inflammatory and pain relief. 3. Medication: When the pain and swelling are serious, patients can take non-steroidal anti-inflammatory and analgesic drugs such as diclofenac and ibuprofen orally for treatment. 4. Surgery: For patients with severe ligament damage and poor joint stability, ligament repair and reconstruction surgery is needed. 5. Functional exercise: When the ankle joint is locally stabilized after surgery, joint mobility training and muscle strength training can be carried out to restore the function of the ankle joint. When the posterior talofibular ligament injury occurs, it is necessary to consult a doctor in time, standardize the diagnosis and treatment, and adhere to the rehabilitation training under the doctor’s guidance, so as to avoid delaying the condition or secondary injury.