An expansion ligament fastening apparatus comprises: a cylinder structure having at least one protruding structure therein; and a multi-segment expansion structure being inside of the cylinder structure, having multi-section unequal structures. When the multi-segment expansion structure moves inside of the cylinder structure, the multi-section unequal structures contact with the protruding structure so that the cylinder structure expands.一種可擴張之韌帶固定裝置,其包含有:一柱狀結構,其內部具有至少一凸出結構;以及一多段式撐開結構,其位於該柱狀結構的內部,該多段式撐開結構的外部具有多段式凹凸不等之結構,當該多段式撐開結構於該柱狀結構內部移動時,該多段式凹凸不等之結構與該凸出結構相接觸,以將該柱狀結構擴張。