Ankle ligament injury is divided into two categories: partial rupture and complete rupture, the former is called sprain or twisting of the ankle joint, the latter can be dislocated or subluxation of the ankle joint. When the deltoid ligament, all the ligaments of the lower tibiofibular ligaments or part of the interosseous membrane are injured at the same time, the separation of the lower tibiofibular ligaments and dislocation of the talus to the outside can occur. Clinically, injuries to the anterior peroneal talofibular ligament and the anterior tibiofibular ligament of the lower tibia are most common, and injuries to the deltoid ligament are often combined with ankle fracture and dislocation. Most of them have a clear history of trauma. Clinically, patients can be found with swelling and pain below the anterior aspect of the ankle, localized tenderness, subcutaneous ecchymosis, limited joint movement and claudication. The pain is exacerbated by passive plantarflexion and inversion of the foot, and reduced by dorsiflexion and pronation. When the ankle joint is in the plantarflexion position when it is completely ruptured, the talus can be displaced forward. In addition to pain, swelling, subcutaneous bruising, bruising, and restriction of foot movement in the lower ankle region, the ankle canal behind the inner ankle can be swollen and bruised; the symptoms of injury to the lower tibiofibular ligament are similar to those mentioned above, but the pain and swelling are in the anterior aspect of the ankle joint rather than in the lateral aspect. The localized pressure pain is most obvious at the ligament below the ankle, and it is more limited, which is easy to be distinguished from the lateral ankle fracture; the pressure pain of the inner ankle ligament injury is mostly at the attachment of the deltoid ligament in the lower part of the inner ankle; and the pressure pain of the injury of the lower tibiofibular ligament is at the anterior part of the ankle joint. Passive inversion of the foot injured ligament is pulled and the pain is aggravated, forcibly inversion of the foot, the outer ankle ligament rupture indentation increased; inner ankle ligament injury, forcibly inversion of the foot pain is aggravated and there may be a ligament rupture indentation, fixation of calf before and after the promotion of the heel can be the phenomenon of medial range of motion; lower tibiofibular ligament injury, hold the heel for the talus lateral or rotational movement, the talus may be found in the increase in the range of motion. (1) Incomplete rupture of lateral ankle ligament In addition to general treatment such as early local cold compresses, the affected foot should be strictly braked to facilitate the repair of the ligament. Incomplete injury of anterior peroneal talofibular ligament should be fixed with calf cast in valgus and dorsiflexion position for 3~4 weeks, and the ankle should be braked and functionally exercised after removing the cast. Incomplete rupture of peroneal talofibular ligament: ankle joint in functional position (90°~100°), calf cast immobilized in valgus and dorsiflexion position for about 4 weeks, and the subsequent treatment is the same as the previous one. (iii) Incomplete injury of the posterior peroneal talofibular ligament Then the calf is immobilized with a calf cast in the valgus and plantarflexed position for 4~5 weeks. (2) Simple incomplete injury of the deltoid ligament in internal ankle ligament injury is usually immobilized with calf cast in the inversion position for 4~5 weeks. Mild cases can also be immobilized with wide adhesive tape in the inversion position for 3 weeks, and then physiotherapy and ankle protection can be applied after the immobilization. (3) Simple lower tibiofibular ligament injury: Use calf cast, and apply pressure on both sides of the ankle joint (apply pressure with palms of hands bilaterally) in order to reset it. Replace the external ankle guard after 4~6 weeks of immobilization. (1) Complete rupture of external ankle ligaments Except for those who cannot perform surgery due to poor general condition, ligament repair should be performed in principle. For advanced cases with repair difficulties, nearby reconstruction of the damaged ligament is needed. (2) Complete rupture of the deltoid ligament with concomitant fracture Repair of the ruptured ligament, open reduction + internal fixation can be performed at the same time for displaced fracture (3) Rupture of the deltoid ligament with separation of the lower tibiofibular joint (most often accompanied by ankle fracture) At the same time as the operation, the lower tibiofibular joint should be fixed with a long screw, and the fixation time is usually not more than 6 weeks. (4) Injury of lower tibiofibular ligament with displaced fracture At the same time of open reduction and internal fixation of the fracture, long screws are often used for pressurized fixation and reduction, and postoperative plaster casting is used for 6-8 weeks, and the time of plaster removal is decided according to the fracture healing.