In order to better combat decision-making, a new study model, the experience adding weight affinity of the commander’s combat decision-making behavior is proposed. From the behavioral point of view, research the commander’s combat decision-making behavior. Analyze the commander’s combat decision-making quality from his mentality and behavior. Then, analyze the influence factors of the commander’s combat decision-making behavior. At last, learn and improve commander’s combat decision-making quality based on EWA model. The experiment shows the model can effectively solve the problem of bad combat decision-making quality because of commander’s lack of successful experiences.