Abstract. Business process modeling is a key technology for crossorganizational business process integration. However, current modeling methods always fall short in describing complex collaboration relationship existing in business process integration in SOA-based collaborative environment. On the basis of existing multi-views business process model, a collaborative business process modeling method is presented to meet the above requirement in this paper. According to the analysis of inter-enterprise collaborative behavior, multi-enterprises collaborative meta-model integrating process, role, service and data is put forward. Then, on the foundation of collaborative meta-model, adopting model mapping method, existing business process model is transformed into multi-views collaborative business process model. The proposed method lays a solid foundation for cross-organizational business process integration.