The invention discloses a protector for preventing
ankle joint sprain. The protector comprises an
ankle guard body provided with a left vertical guard plate, a right vertical guard plate and a connecting bottom plate, wherein the
ankle guard body is integrally made of a
metal or
high polymer material plate, and a U-shaped space formed among the left vertical guard plate, the right vertical guard plate and the connecting bottom plate is used for allowing a
heel to be inserted in; front portions of upper ends of the left vertical protection plate and the right vertical protection plate are higher than the anterior
articular surface of the talus, rear portions of the upper ends of the left vertical protection plate and the right vertical protection plate are higher than the posterior
articular surface of the talus, a receding opening which extends downwards and avoids the
malleolus medialis or the
lateral malleolus is formed between the front portions and the rear portions of the upper ends of the vertical protection plates, and inner walls of the left vertical protection plate and the right vertical protection plate are each provided with a soft
cushion. The ankle joint sprain prevention device can be used for prevention of ankle joint sprain, post-injury protection of a patient suffering from primary ankle joint sprain and symptom control of a patient suffering from repeated ankle joint sprain, can generate powerful protection on high-intensity exercise and
physical work, particularly on the conditions of mountain complex
terrain, wet and slippery ground conditions and the like, and is suitable for popularization and application.