A　research　on　3D　shape　model　mock　cutting　technology　has　recently　been　conducted　actively.　Game　industry　has　also　developed　3D　mock　cutting　module,　however,　even　though　it　is　optimized　to　repeat　mock　cutting　in　real　time,　there　is　a　problem　in　a　complex　model　that　the　object　is　also　to　be　cut　other　than　the　scope　of　cutting.　Therefore,　in　this　paper,　it　was　improved　to　only　cut　the　designated　scope　to　overcome　such　problem.　©　2018　IEEE.