Passenger　cars　are　the　main　force　of　China＇s　auto　market.　In　this　paper,　China＇s　major　passenger　car　market　is　classified　by　the　objective　criterion.　Through　the　regression　analysis　of　135　models　market　data,　the　passenger　car　market　is　divided　into　five　categories　by　value　and　size.　The　value　of　each　segment　was　estimated,　and　the　total　value　of　China＇s　major　passenger　car　market　is　estimated　not　less　than　18　billion　Yuan.　We　can　get　the　conclusion　that　the　model　relationship　in　the　same　segment　of　the　model　is　competing,　and　the　relationship　between　models　which　are　not　in　the　same　market　segments　is　weak　competing.　It　is　important　significance　for　the　companies　to　determine　their　market　orientation.　©　2010　IEEE.