With　the　development　of　highway　in　China,　more　and　more　people　pay　attention　to　the　problem　of　interchange　road　safety　increasingly.　In　this　paper,　Majuqiao　interchange　in　Jingjintang　highway　is　taken　as　research　target.　Based　on　road　data,　traffic　data　and　accident　data,　concerning　on　the　type　of　interchange,　the　geometric　design　of　ramp　and　the　design　of　acceleration　lane,　some　ways　are　brought　out　for　adjusting.　Moreover,　the　paper　focuses　on　the　type　and　the　length　of　acceleration　lane　in　order　to　enhance　the　degree　of　interchange　safety.