The research and product of military equipment is a typical complex systems engineering, under the context of rapid change in military theory and operation demand, military industry faces many problems, such as complex management methods, the lack of digital design capacity, mismatch of capabilities and requirements, equipment maintenance and support difficulties. Digital engineering plays an important role in weaponry analysis, research, service and maintenance. So, it’s necessary to carry out relative research about the methods of weaponry digital development from promotion mechanism of digital engineering, requirement analysis of equipment digital capability, construction standard of digital twin system, which has important meanings to the digital development of Military Industry.