Knowledge-intensive is a significant feature of the modern service-oriented industrial structure, and knowledge service is a main part of knowledge science. With research practices and accumulations in the field of tribological knowledge acquisition of turbine, automobile engines and other complex mechanical systems, construction of knowledge base and cooperation with enterprises in chain of “University-Industry-Research”, based on the understanding and experience of conceptual contents and features of tribology, knowledge service and resource unit and other concepts in the process of utilization, this paper studied the expression of modeling knowledge in the process of basic tribological knowledge service, construction of knowledge unit based on knowledge base and the driving force of knowledge acquisition and knowledge flow.