Objectives: To give some remarks on treatment results of the unstable fractures of the pelvic ring by external fixation on the prevention of shock, anatomical recovery and rehabilitation. Also, we gave some comments on indications, techniques and complications. Subjects and methods: 71 patients with unstable fractures of the pelvic ring type B and type C according to Tile M’s classification were treated by external fixation at 103 Military Hospital and National Institute of Burns from May 2010 to Feb 2017.