To adapt to the variability and uncertainty of the battlefield environment, starting from multiple factors of the battlefield situation, the air defense combat deployment scheme is evaluated and the optimal scheme is chosen from several alternatives. In view of the variability and uncertainty evaluation index, an evaluation method of multiple attribute decision making is presented. The factors that affect the operational deployment are primary and secondary divisions. To the problem of the weight of each parameter, the entropy method is used to calculate weight for sure. According to the scheme of the various parameters to calculate the ideal value and the negative ideal value, degree of each scheme are relatively close to the calculated, thus realizing quick selection of optimal deployment plan. An example is given to verify the effectiveness of the method.