Aiming at the problem of threat evaluation of warship formation in uncertain marine battlefield environment, a dynamic decision-making method based on intuition fuzzy sets is proposed. Firstly, the information in different types of air targets is standardized and intuition fuzzy decision-making matrices can be gained. Secondly, the initial weights of evaluation indexes are computed by using intuitionistic fuzzy entropy and an optimization model combining subjective preference information of commander is established to get more reasonable weight results. Then, time series weight is obtained to handle multi-moments data basing on normal distribution. Finally, on the basis of TOPSIS, levels of threat the raiding targets pose can be assessed and sequenced. A simulation example illustrates the feasibility of the proposed method which provides an effective way to solve the problem of threat evaluation of warship formation.