It　is　very　difficult　to　use　conventional　modeling　software　directly　to　build　a　complex　excavation　engineering　model.　According　to　a　hillside　landscape　design　example　and　based　on　geometric　theory,　the　paper　puts　forward　a　method　to　compute　point　coordinate　of　3D　complex　model.　Then　3D　surface　of　the　model　is　generated　and　is　used　to　incise　the　hillside　body　to　get　the　excavating　model.　Finally　the　model　is　visualized　to　obtain　full　3D　effect　of　the　engineering.　©　(2014)　Trans　Tech　Publications,　Switzerland.