In order to improve the accompanying support capability of a certain missile launching unit in mobile operations, a comprehensive evaluation method based on the AHP method and the entropy method is proposed. According to the operational task of the accompanying support of the certain missile launching unit in mobile operations, the characteristics and requirements of the support task at each stage are analyzed. Then, the ability indexes system is established, the comprehensive weight of each index is calculated by means of AHP and entropy weight method. According to index system, use entropy evaluation method to evaluate the accompanying support capability of a certain missile launching unit in mobile operations. Solve the problems of uncertainty evaluation index and the lack of objectivity. The results show that the index system proposed in this paper is reasonable and effective, and the evaluation method provide a scientific theoretical basis for improving the accompanying support capability of a certain missile in mobile operations.