The selection of maintainability parameters and the determination of indicators for civil aircraft are one of the basic tasks of maintainability design. In order to reflect the objectives of civil aircraft maintainability, operating cost and maintenance manpower, it is necessary to select appropriate maintainability parameters and determine maintainability indicators. Due to the lack of design experience and design data, the domesticallymade civil aircraft cannot use mature methods to select maintainability parameters and determine the indicators. This paper focuses on this issue. Combined with the design characteristics of civil aircraft, the selection method of maintainability parameters of civil aircraft was explained. By the tradeoff the effectiveness of various influencing factors and maintainability parameters in civil aircraft design, the appropriate civil aircraft maintainability parameters were selected from three types of parameters related to maintenance time, maintenance manhours, and maintenance cost. In view of the current status of civil aircraft design, the basis for determining maintainability indicators and practical methods were clarified to ensure that civil aircraft have good maintainability. The research solves the problem that there is no reference basis for the selection of maintainability parameters and index determination in the domesticallymade civil aircraft, and provides a feasible way for the selection of maintainability parameters and index determination of civil aircraft.