A bioabsorbable bone nail which can be developed under X-ray is composed of a spiral part and a cap type, the screw part has a cylindrical shape, and the cap type is arranged at one end of the spiral part, and extends outwards from the spiral part. The cap type and the screw part are made of a polylactic acid (PLA) and a nanometer. Made of grade III iron oxide. The invention can be developed and imaged under X-ray, and is compatible with an animal cell, which can degrade the bone nail.一種可於x-光下顯影之生物可吸收性骨釘，係包含一螺旋部以及一帽型，該螺旋部具圓柱狀外型，而該帽型設置於該螺旋部一端，且自該螺旋部向外延伸，其改良在於該帽型及該螺旋部為一體成型製作，且該帽型及該螺旋部以一聚乳酸（Polylactic acid，PLA）及一奈米級四氧化三鐵所製作。本創作可於x-光下顯影成像，並與一動物細胞相容，該動物細胞可降解該骨釘。
