A kind of device for bone fixation, it is followed closely including bone fixation, proximally extend to distal end, this distally has helical structure, it is arranged to engagement bone, the insertion portions of proximal bone fixation nail that there is opening to extend in first sleeve therein for proximal end is across intramedullary nail holes, first sleeve allows skeleton fixing nail to axially move, wherein it is configured to limit bone fixation nail relative to first sleeve in scheduled motion range and lock-screw, the bone fixation nail that lock-screw is configured to lock ground coupling opening has head and from its distally extending thread spindle.
