The　paper　analyzes　characteristics　of　multidisciplinary　collaborative　design　(MCD)　of　product　and　proposes　a　new　MCD-oriented　product　information　model　(MCDPM)　that　integrates　physical　structure,　design　semantic　and　collaboration　management　data.　Better　understanding　and　coordination　among　the　different　disciplines　can　be　achieved　through　the　multi-level　relations　at　the　semantic　level,　structure　level,　and　management　level.　An　extended　object-oriented　method　is　introduced　to　represent　the　MCDPM.　As　a　component　and　its　attributes　are　all　defined　recursively　in　class　form,　the　model　can　be　continually　extended　and　has　good　modularity,　flexibility,　and　evolution　ability.　The　class　inheritance　methods　in　network　environment,　the　concept　of　discipline　view　model　(DVM)　and　the　method　generating　the　DVM　are　given.　The　coordination　and　consistency　maintenance　among　multiple　DVMs　is　discussed.