In order to adapt to the rapid evolution of war form and combat mode brought about by new technology, this paper puts forward the analysis of combat system of artificial intelligence in military field. By changing the traditional combat mode and establishing an intelligent combat system in line with the actual situation of our army, this paper makes a concrete analysis of the intelligent combat system from three aspects of basic connotation, constituent elements and supporting technology, and deeply understands the intelligent combat system. The results show that the analysis can provide a reference for the research and establishment of intelligent combat system.