After many hardships, it has become the consensus of the domestic aviation industry that we must strive to promote the construction of the operation support capacity of civil aircraft manufacturers. As operation support is an extension of "traditional business chain" of domestic aviation manufacturing industry, although there are foreign product operation practices to learn from, it still needs more exploration and experience accumulation to achieve the ability of "knowing why" of operation support system and capacity building. Based on the long-term follow-up and limited participation in the operation practice of several domestic civil aircraft, this paper expounds the views on several problems in the operation support capacity building of domestic civil aircraft manufacturing enterprises. Firstly, the importance of "operation support technology" in the construction of "operation support capability" is analyzed; It is proposed to cultivate spare parts market through "minimum replaceable parts" decomposition to reduce cost, provide value-added service for user product operation by adding "new skills" training demand, promote manual compilation technology update and add new highlights for domestic civil aircraft operation support. It is hoped that based on the discussion of operation support capacity building of civil aircraft manufacturers, it can promote their technical development and promote the application of relevant ideas in the field of civil aircraft, so as to meet the major national needs and engineering practice.