[Objective] To prospectively explore the clinical efficacy of Minimally invasive treatment of lumbar spondylolisthesis using modified TLIF technique assisted by Quadrant system. [Methods] From April 2008 to April 2009,76 patients of single- level lumbar spondylolisthesis were divided into two groups randomly,and accepted Quadrant system assisted transforaminal lumbar interbody fusion( TLIF) and tranditional posterior lumbar interverbody fusion( PLIF) operation. The skin incision length,operative time,blood ...