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Evaluation of military aircraft support plan has a significant impact on the efficiency of aircraft system. In order to solve the problem that support plan evaluation has many defects in angles and methods in previous studies, the evaluation model based on fuzzy analytical network process (FANP) is presented. Firstly, support system characteristics are abstracted to determine evaluation elements (or clusters) of military aircraft support plan. Secondly, Analytical network process is used to describe relationships between two elements (or clusters) and compare their relative importance. Triangular fuzzy number is parameterized linguistic variables to handle with the vagueness and subjectivity of pairwise comparisons in a fuzzy environment. Two methods are synthesized to obtain final priority ranking of alternatives. Finally, evaluating certain type aircraft support plan is given as an example, and feasibility and validity of model are verified. It could provide an excellent decision supporting for defense industrial sectors to evaluate military aircraft support plans.