To　study　the　effect　of　contact　and　helix　angles　on　slide-roll　ratio　at　the　ball　contact　point　under　the　uniform　motion　state　of　ball　screw　mechanism　(BSM),　a　slide-roll　ratio　model　was　derived　in　the　literature　[9]　were　used　in　this　paper.　It　also　conducts　a　simulation　analysis　of　the　slide-roll　ratio　relationship　between　the　uniform　motion　at　the　ball　center　and　ball　contact　point　under　different　contact　angle　and　helix　angle.　As　shown　by　the　analysis,　with　the　increase　in　the　BSM＇s　contact　angle,　the　slide/roll　ratio　at　the　contact　point　decreased,　and　the　contact　angle　had　a　relatively　significant　effect　on　the　slide/roll　ratio;　however,　with　the　decrease　in　the　BSM＇s　helix　angle,　the　slide/roll　ratio　at　the　contact　point　decreased,　and　helix　angle　had　a　relatively　insignificant　effect　on　the　slide/roll　ratio.