The present invention provides an orthotic system for an ankle joint, comprising a thermoplastic shaping plate and a plurality of fastening members. The thermoplastic shaping plate has a mirror symmetric shape formed by a base portion and two extending portions, called a first extending portion and a second extending portion. When the thermoplastic shaping plate is heated and shaped into a 3D orthotic system, the base portion is to wrap around a foot and the two extending portions are symmetrical with the Achilles tendon to wrap around the limb above the ankle joint, fixed by the plurality of fastening members.本創作係提供一種用於踝關節的矯正系統，具備一熱塑形板及複數個緊扣構件，其中該熱塑形板具有一個圍繞足部的基底部分及2個從基底部分彼此朝相反方向延伸的第1延伸部分及第2延伸部分所構成的鏡像對稱的平面形狀，當該熱塑形板加熱成形為立體的用於踝關節的矯正系統時，該基底部分圍繞足部，藉由緊扣構件固定該基底部分，該第1延伸部分與該第2延伸部分以阿基里斯腱為對稱線地圍繞踝關節上方的肢體，藉由複數個緊扣構件固定該第1延伸部分與該第2延伸部分。
