For the problem of missile condition evaluation and decision,a method of missile condition evaluation and decision based on improved grey relational analysis with combination weighting is proposed.By analyzing the influencing factors of missile state,the index system of missile state parameters is constructed.On this basis,the improved grey relational analysis method is used to evaluate the missile state and make decision.Because the grey correlation analysis can only give the order of the correlation coefficient of the missile state to be selected,it can not reflect the real state of the missile.It is improved by introducing the lowest state parameter comparison sequence to obtain the objective missile state.The determination of gray relational analysis index weights is a key factor in determining the accuracy of the evaluation.In order to balance the advantages and disadvantages of subjective weighting and objective weighting,the weight determination scheme of the combination of Fuzzy AHP and entropy weight method is used.Through the analysis of an example and comparison with traditional methods,the feasibility and accuracy of the method are verified.