【Abstract】 Objectives To investigate the clinical outcomes of Denis typeⅢ sacral fracture using sacral decompression lumboiliac fixation. Methods From May 2009 to May 2015,20 patients with Denis typeⅢ sacral fracture were treated using sacral decompression lumboiliac fixation. Radiological outcomes measured after operation and during the followup period. Gibbons scoring system and majeed pelvic scoring system were used to evaluate clinical outcomes. ResultsAll the patients were followed up from 12 to 25 months with an average of 163 months. The fracture healed well without infection and fixation failure. The Gibbons′ score decreased significantly （P＜001） from before operation to final followup, while Majeed score increased significantly （P＜001）.The Majeed score showed an excellent result in 11 cases, good in 4 and moderate in 5. Conclusion Lumboiliac fixation sacral decompression is effective for Denis typeⅢ sacral fracture, which can promote the recovery of nerve injury and quality of life.