This study explores the issue of identifying key resource nodes in an integrated joint operations environment. As the complexity of modern warfare increases, there is an urgent need for understanding and optimizing combat systems. This research proposes a comprehensive method for identifying key resource nodes based on different phases of combat missions and operational conditions. The method identifies the most impactful resource nodes on the combat system using dynamic analysis techniques, based on the “contribution” and “activity” of the resource nodes. This study not only provides new perspectives and methods for resource management in combat systems but also offers theoretical support for enhancing operational efficiency and effectiveness in future warfare.