In battlefield environment,it is difficult to determine the level of threat of multiple incoming targets.To solve the problem,a multi-target threat assessment method based on double-layer variable weight and TOPSIS-gray correlation is proposed.Firstly,Analytic Hierarchy Process (AHP) is used to calculate the subjective weights of target indexes,the improved entropy weight method is used to calculate the objective weights of target indexes,and the subjective and objective weights are then combined to obtain the first-layer weight.Then,a comprehensive equilibrium function is constructed,which integrates the variable weight theory with the first-layer weight to obtain the final weight.Finally,according to the decision-makers preference to the TOPSIS method or the gray correlation method,the multi-target threat assessment results are obtained.The simulation results show that: 1) The proposed method is more in line with the actual situation by combining the subjective and objective factors of the indexes with the impact of state value on the weights;2) The ranking results comprehensively consider the changes in the distance between the indexes and the changes of the index shape,and a comparison with other methods also proves the effectiveness of the proposed method.