The team mental state is a key point for making cooperative air combat decision. In this paper, we focus on the modeling of mental states of the combat team by means of analyzing the requirements of making cooperative air combat decision. Modeling of various mental states of the combat team including mutual belief, joint combat goal and plan are proposed based on the combat environment, combat mission, and the combat capability of each member in the combat team, etc.. We also discuss the dynamic attributes of the team mental states, such as the mutual belief revision, joint combat goal and joint combat plan updating etc., in the light of the combat mission, situation and the combat capability, etc. .