The so-called ankle joint consists of the lower end of the tibiofibula and the talus. Its fracture and dislocation are common injuries in orthopedics, mostly occurring after ankle sprains caused by indirect violence. Depending on the direction and size of the violence and the position of the foot at the time of injury, it can cause various types of fractures. The Lange-Hansen, Davis-Weber, and AO classifications were introduced in 1950, and the fractures were classified into four categories: posterior/internal, posterior/external, anterior/adductor, and anterior/external according to the position of the foot at the time of injury and the direction of the violence. Each category is divided into different subcategories according to the degree of fracture and the presence or absence of ligamentous soft tissue injury. The Davis-Weber classification classifies ankle fractures into types A, B, and C according to the location of the external ankle fracture, which is divided into injuries below the level of the inferior tibiofibular union (type A), fibular fractures through the inferior tibiofibular union (type B), and injuries above the inferior tibiofibular union (type C), which is simpler and easier to use but does not account for the various complex changes in the entire ankle joint. The International Academy of Trauma (AO) further refined the Davis-Weber classification and proposed the AO classification.