Data used in conceptual aircraft design process is extraordinary excessive. It is composed of many kinds of data, such as digital, diagram and document, etc. Especially, the data has the strong requirement of security. This paper was focused on how to use the advanced database technology to manage all the data design process with efficiency and rationality. By analyzing the characteristics of the data in conceptual aircraft design process, the data were divided into several species. A new technique for data management in conceptual aircraft design was brought forward, which is use the advanced and new object-oriented technology that was developed in recent generation to classify and manage the data in conceptual aircraft design process, and a simple instance is also presented. Finally, it introduced some attentions should be paid in database design and use process.