Adjustable ankle foot orthosis

The utility model discloses an adjustable ankle foot orthosis which comprises a main body composed of a longitudinal section and a transverse section, the upper end and the lower end of the longitudinal section are both connected with connecting buckles, the connecting buckles are fixedly sleeved with bandages, a cavity is formed in the longitudinal section, a ball screw is rotationally installed in the cavity, a driving gear and a nut are installed on the ball screw respectively, and the driving gear is connected with the transverse section. A traction ligament connected with the transverse section is connected to the nut through a pin shaft. According to the utility model, the ball screw capable of rotating bidirectionally is arranged on the longitudinal section, and the nut capable of moving up and down is arranged by utilizing the ball screw; the hollow opening is formed in the tail end of the transverse end, and the flexible plate is elastically supported by the telescopic rod, the spring and the sleeve,