The ankle joint is the heaviest flexor joint in the human body. It is composed of the medial and lateral malleolus of the lower end of the tibia and fibula and the talus. The talus is surrounded by the ankle hole composed of the medial malleolus, posterior malleolus of the tibia and the lateral malleolus of the fibula, and is firmly fixed in the ankle hole by ligaments. Because the body of the talus is in the ankle hole, it is surrounded by strong ligaments and is firm and stable. When the ankle joint is severely injured, it is often accompanied by fracture and dislocation of the ankle joint. Simple ankle dislocation is also extremely rare, and is often accompanied by fractures. Ankle injuries that are mainly dislocations and combined with milder fractures are referred to as ankle dislocations. Ankle dislocations are mostly caused by indirect violence, such as twisting and twisting. It is common to fall from a height, land on the inside or outside of the foot, walk on uneven roads, or slip on flat ground, causing the foot to rotate, invert or evert excessively, often resulting in dislocation, and often accompanied by fractures. According to the direction of dislocation, it can be divided into: external dislocation, internal dislocation, anterior dislocation, and posterior dislocation. Generally, medial dislocation is more common, followed by lateral dislocation and open dislocation. Posterior dislocation is rare, and anterior dislocation is extremely rare.