The invention relates to an ankle support fixator which comprises a shoe shell (1), lining (2) is arranged in the shoe shell (1), the shoe shell (1) comprises a toe part (3) and a heel (5), and a soft insole (6) is arranged at a shoe bottom part (4). The ankle support fixator is characterized in that the arch part of the foot is provided with a raised arch support pad (7), ankle fixing grooves (9) which protrude outwards are formed in the two side faces of the middle inside the shoe tube, tightening buckles (8) and tightening buckles (10) are arranged on the up and down peripheries of the outer side, horizontally corresponding to the ankle fixing grooves (9), of the shoe tube, the tightening buckles (8) and the tightening buckles (10) are used for threading a rope to fasten the shoe tube at the ankle part, an elastic band (11) is arranged on the front part and the rear part of an inlet formed in the upper portion of the shoe tube, and the ankle part can enter the ankle support fixator conveniently. According to the ankle support fixator, the defect of an ankle lesion treatment and rehabilitation method in the prior art is overcome, the application effect is good, and the ankle support fixator is an ideal medical auxiliary appliance and has good application and promotion value.