Three-degree-of-freedom ankle joint exercising device

The invention relates to a three-degree-of-freedom ankle joint exercising device, which comprises a bottom frame, a foot ankle support mechanism, a slide rail mechanism, a connecting mechanism and a driving mechanism, wherein the foot ankle support mechanism is used for putting a foot bottom plate, the foot ankle support mechanism is connected with the slide rail mechanism through the connecting mechanism, and the foot ankle support mechanism and the slide rail mechanism are fixedly arranged on the bottom frame. The three-degree-of-freedom ankle joint exercising device has the advantages that the telescopic connecting mechanism is connected with the foot ankle support mechanism and the slide rail mechanism, so the exercising of the ankle joint in a three-degree-of-freedom space is realized, and the rehabilitation exercising of dorsiflexion/straight flexion, inward turning/outward turning and inward rotating/outward rotating of the ankle joint of a human body is realized; the integral structure is simple, the production and manufacturing are easy, and the maintenance is convenient.