Abstract: In view of the frequent ankle injuries in athletics and military training, four pairs of functional footwear with different ankle protectors and torsion resistant structure were designed and produced in this study by optimizing the structure of arch carbon fiber plate and ankle joint protective strap. The biomechanical data of four pairs of ankle protectors and anti-torsion functional shoes were collected under 45° side-cut motion and 60 cm jump motion, respectively, by using the Kistler three-dimensional force measuring platform and motive three-dimensional motion capture system. The movement stability of shoes was tested, and the effects of the structure of arch carbon fiber plate and ankle joint protective strap on the lower limb biomechanics of the subjects were studied. The results showed that the ankle joint protective strap structure could reduce the risk of ankle sprain and played a role in ankle protection. The carbon fiber plate structure in the arch can improve the anti-torsion performance of the shoe, but has a certain negative influence on the flexibility of ankle joint.