In　this　paper,　the　method　of　triangles　slice　construction　was　presented　for　reconstructing　3D　pipeline　surface.　In　this　means,　shape　point,,　were　calculated　by　surface　outline　equation　which　was　got　from　quadratic　surface.　Then　these　shape　points　were　patched　with　triangles　grid　to　constructed　triangles　slice,　which　gained　the　pipeline　surface　model.　Finally,　the　pipeline　models　were　rendered　by　means　of　computer　graphics　in　order　to　implement　3D　pipeline　surface　reconstruction.　In　the　end,　a　reconstruction　instance　was　given.