Aimed at the poor usability and low efficiency of UML modeling for enterprise software and application(ESA),an ESA oriented platform-independent model(ESA-PIM) based on extended UML is proposed to solve the problem.First,an integrated multi-view PIM model based on business objects was constructed by analyzing the characteristics of ESA.Then using the extended mechanism of UML,the new meta-classes,stereotypes and tagged values that describe the concepts and relationships in ESA-PIM were added into UML2.0 meta-model,and they were divided into different viewpoints in the extended UML meta-model.The ESA-PIM proposed in this paper realizes the semantic-based integration between various UML diagrams through the richsemantic business objects,which improves the usability of UML and enhances the modeling efficiency of ESA.The feasibility and effectiveness of ESA-PIM were verified by an application case.