Aiming at the information exchange requirements of joint operations and the interoperability of multi-service operational data, this paper explores how the C2SIM standard guides the efficient interoperability among command and control systems, simulation systems and unmanned systems. This paper summarizes the status, function and development of C2SIM, introduces the development method of C2SIM logical data model, and analyzes the key technical problems of C2SIM from the aspects of C2SIM core ontology, domain ontology extension, transformation from ontology to XML Schema and reference implementation; This paper discusses the application of C2SIM standard in NATO military exercises in recent years, summarizes the development and influence of C2SIM, and provides inspiration and reference for the construction of standardized interoperability technology in our army. The results show that the research can effectively improve the development ability and quality of military information system.