With　the　information　technology　development,　the　manufacturing　informatization　has　developed　rapidly　in　recent　years.　3D　computer　aided　design　(CAD)　has　become　indispensable　for　developing　new　products.　Network　also　plays　an　important　role　in　exchanging　information.　In　this　case,　people　have　a　growing　tendency　to　exchange　information　by　3D　model　rather　than　text　or　images.　Through　network　platform　to　provide　3D　dynamic　display　and　lectotype　service　becomes　the　trend　of　the　development　gradually.　So　in　this　paper,　a　3D　dynamic　display　and　interactive　lectotype　system　was　presents　for　mechanical　design.　This　paper　put　forward　a　solution　to　exchange　information　by　3D　model　by　integration　of　3D　CAD　and　Web3D　techniques.　Use　the　Viewpoint　technique　to　displays　interactive　3D　models.　Base　on　SolidWorks　to　exchange　the　3D　CAD　model　to　Viewpoint　model,　and　generation　2D　and　3D　commonly　format　files　for　downloading.　Use　database　management　system　to　manage　all　kinds　of　data.　Proved　by　practice,　this　system　can　significantly　increase　conversion　and　improve　the　customer　experience.