Based　on　the　basic　theory　of　self-organizing　data　mining　and　the　background　of　the　bike　frame＇s　design,　select　several　body　sizes　and　body　characters,　which　may　have　impact　on　the　bike　frame　sizes,　and　the　corresponding　frame　sizes　as　data　sample,　then　create　input/output　models　in　Knowledgeminer,　finally,　find　the　quantitative　relationship　between　body　characters　and　frame　sizes,　realize　the　customization　design　of　the　bicycle＇s　frame.