Ankle-foot orthosis

The utility model provides an ankle and foot orthosis, and relates to the field of orthopedic instruments. The ankle-foot orthosis comprises a shank support chip, a foot support chip and an ankle joint hinge, wherein the ankle joint hinge is connected to the positions, corresponding to the two sides of the ankle joint, between the shank supporting piece and the foot supporting piece, the ankle joint hinge comprises connecting end parts at the two ends and a telescopic section in the middle, and a locking structure used for keeping the ankle-foot orthosis in an orthotic state is further arranged between the shank supporting piece and the foot supporting piece. The telescopic section can adjust the positions of the shank support chip and the foot support chip; the shank support chip and thefoot support chip are limited in a correction state by the locking structure; according to the specific introversion or extroversion condition of a wearer, the wearer can wear the mask; when the ankle-foot orthosis is worn, t