The built-in inflatable bag can increase the stability and the compressibility to keep injured ankle in correct place further, promote the healing of the injured bone, and provide excellent protection. The aluminum brackets on both sides of fracture boot provide strong fixed effect for ankle and foot, and design of aluminum brackets meet leg contour. Built-in inflatable compression can increase comfort reduce edema and adapt to changes in different swelling levels during the rehabilitation period. Rocker bottom design can improve normal walk, and promotes a smoother and more natural gait during rehabilitation to enhance user's mobility. The walking boot intended for stress fractures of the foot and ankle, sprained ankle, broken foot, soft tissue injuries and achilles tendon rupture.