The invention discloses a three-dimensional ankle and foot orthosis, and relates to the technical field of orthoses. The rear upper end of a foot sleeve is connected with a small foot sleeve through arotary shaft, a rotary disc is mounted at the lower end of the small foot sleeve, and the upper end of the small foot sleeve is connected with an elastic strap. A bottom correction airbag is mountedat the bottom in the foot sleeve, a foot containing groove is formed in the upper surface of the bottom correction airbag, an extruding airbag is arranged on the upper side in the foot sleeve, and a reinforcing plate is arranged at the upper end of the extruding airbag. A pressing device is mounted at the upper end of the foot sleeve, a pressing rod of the pressing device is connected with the reinforcing plate of the extruding airbag, an electric strap winder is mounted on the side wall of the small foot sleeve, and a connecting strap is arranged on the electric strap winder. One end of the connecting strap is connected with the upper surface of the foot sleeve, and the foot sleeve is connected with the front portion of the small foot sleeve through the elastic strap. The three-dimensional ankle and foot orthosis can be fast adjusted conveniently, and is high in efficiency, high in comfort degree and breathable, and time is saved.