Abstract:Starting from the project knowledge integration, which is the core issue of Project Integration Management,this paper proposes knowledge integrated models and identify methods and paths by the theories of project knowledge networks and stakeholders knowledge networks based on defining the project breakdown structure (KBS) systematically. It explores the dynamic rule of knowledge spiral evolution in the project knowledge integration to realize the rapid integration of crossphase and multidomain knowledge in project management activities though sustained adjustment and reconstruction phase, improves the communication efficiency under dynamic conditions, provide the theoretical basis of identifying elements for the project knowledge system and promote the continuing escalation of enterprise knowledge systems.