There　exist　many　differences　in　nomenclature　and　descriptions　of　products　and　parts　in　collaborative　enterprises,　which　greatly　hinder　the　retrieval　and　sharing　of　web-based　product　information.　In　this　paper,　we　present　an　extended　Bayesian　network　for　retrieving　and　integrating　the　product　information　of　collaborative　enterprises　based　on　product　ontology.　This　approach　not　only　reduces　the　complexity　of　existing　ontology　mapping　methods,　but　also　increases　the　efficiency　of　product　information　integration.