Ankle load-free rehabilitation training device

The ankle load-free rehabilitation training device comprises a protection plate, an air bag, a support and inflation and deflation equipment, the protection plate is in a vertically-extending barrel shape, and a vertically-extending first opening is formed in the protection plate. The air bag is cylindrical and is sleeved in the protective plate, and a second opening which vertically extends is formed in the position corresponding to the first opening; the air bag comprises a plurality of transversely-arranged bag units, the bag units in the odd-numbered rows are communicated with one another to form a first bag set, the bag units in the even-numbered rows are communicated with one another to form a second bag set, and the first bag set and the second bag set are isolated from one another. The support is located below the protection plate and connected with the bottom end of the protection plate. The inflation and deflation equipment is connected with the first bag set and the second bag set. In the embodimen