Abstract: Based on the characters of comprehensive evaluation of civil aircraft maintenance, the comprehensive evaluation method of civil aircraft maintenance is specified by the combination of the fuzz comprehensive evaluation and D-S evidence combination method. As shown in this paper, by defining both the influenced maintenance indexes and the hierarchy structure models, the best project may be selected at last on maintenance between different designs or aircraft models by weight values of several integrated indexes which are marked by decision-maker at the same standard.

Key words: maintenance, fuzz comprehensive evaluation, D-S evidence combination, civil aircraft