Objective To evaluate the biomechanical characteristics of Hook-plate fixation (HPF) in abruption of lower tibiofibular ligament union,comparing with screw,plate,hook fixation. Methods 6 fresh specimen of adult foot were used. Biomechanical tests such as stress analysis and press sensitive film patch technique were performed to measure the change of intensity,strain,load area,contact pressure of lower tibiofibular,carrying capacity of digitoplantar and stability of ankle joint in each fixation. Results HPF was superior to the other three fixations. The difference was significant(P<0.01) Conclusion This study suggests that HPF was favorable to improve the biomechanical capability and stability of the ankle joint,save once operation and screw broken, improving carrying capacity of digitoplantar. It was one the best fixations of abruption of lower tibiofibular ligament union.