A simple external ankle fracture is a clinically common type of ankle fracture, and early tests by Ramsy et al. found that a small displacement of the external ankle can cause a significant reduction in the tibio-talar joint contact area, resulting in an increased load per unit contact area. The medial side of the fibula has a valgus angle of about 10-15° with the sagittal plane, and the fibula is prone to shortening and upward displacement after the fracture, narrowing the ankle cavity. after the deformity heals, the pressure on the outer ankle side of the talus decreases and the pressure on the inner ankle side increases, and the talus loses stability in the ankle cavity, making it prone to traumatic arthritis, which is one of the main reasons why patients feel pain and affect the function of the ankle joint. yablon et al. also found that double Yablon et al. also found that if the external ankle fracture is poorly reset, the talus cannot reach its normal position in the ankle cavity, thus proposing that the external ankle is an important factor in maintaining the stability of the ankle joint, and an external ankle displacement greater than 2 cm must be operated to achieve anatomical reset. Requirements for repositioning: 1. Restore the length of the fibula to avoid upward displacement. 2. Restore the 10°-15° angle between the axis of the fibular stem and the axis of the external ankle.