Abstract: The selection and optimization of operation plans have always been a difficult task in combat command decision-making. The decision-making of combat plans involves many factors and is usually multi-objective, leading to a complex selection process. To achieve the optimization of combat plans, this paper uses the grey correlation analysis method based on the ideal plan to perform quantitative calculations, obtaining the quantitative value of the proximity of each feasible plan to the ideal plan. Thus, the optimal plan can be identified among multiple plans. At the same time, to reduce the subjectivity of gray correlation analysis method, the analytic hierarchy process is introduced to determine the weights of various evaluation indicators. A set of combat plan evaluation methods is formed, making the process of evaluating and selecting combat plans more scientific and reasonable. Finally, by assuming that multiple combat plans are formulated in a certain area, the methods established in this paper are used to evaluate combat plans, achieving plan optimization.