Civil aircraft is assembled by various of and a large number of parts and components, which requires a clear classification of aircraft products in order to establish an efficient technology control mechanism throughout the whole lifecycle. This paper adopts system engineering methodology to identify the stakeholders of aircraft products. On the basis of analyzing and summarizing the demand of key stakeholders, the paper proposes a source-based civil aircraft product classification solution and criteria which is used to distinguish specified parts from equipment. A unified, standardized and multi-dimensional civil aircraft product classification and definition method has been formed. The case of certain type aircraft product classification indicates the proposed source-based civil aircraft product classification solution is convenient for engineers to quickly determine product categories in practical work, which ensures the accuracy and effectiveness of product classification, provides a basis for civil aircraft product design and technical management, and satisfies the application requirements of civil aircraft projects.