Based　on　the　basic　theory　of　self-organizing　data　mining　and　the　backgrounds　of　bicycle＇s　frame　design,　several　body　sizes　and　body　characters,　which　may　have　impact　on　the　bicycle＇s　frame　sizes,　and　the　corresponding　frame　sizes　are　selected　as　data　sample,　then　create　input/output　models　in　Knowledgeminer　are　created.　Finally,　the　quantitative　relationship　between　body　characters　and　frame　sizes　is　found,　and　the　the　customization　design　of　the　bicycle＇s　frame　is　realized.