The construction of war case event map is a key measure in improving the decision-making capability of edge operations. Based on the in-depth study of edge combat, auxiliary decision-making and knowledge graph, a war case event map is presented. Firstly, the logical structure of war event graph is described, the elements and associations of war events are sorted out, and the knowledge representation model of war event graph is constructed, and then, through the case event data source selection, event extraction and event relationship identification, the practice of case event map construction is conducted to verify the feasibility of the model. On the basis of this, the application mode and methods of the war case event map in intelligence analysis, situational awareness and scheme formulation are explored. The war case event map is a great help to realizing the structured organization and effective management of combat knowledge, and making full use of the computing power and technology of the central node to improve the edge combat command ability