Abstract: With more and more risks appearing in the aero-engine manufacturing projects th at have the characteristics of long research period, high techniques and complex systems, it is extraordinarily significant to define the risk and establish the risk analysis index system for aero-engine projects. In this paper, according to the analysis of aero-engine research projects, we have investigated the reso urces and characteristics in aero-engine developing projects, and then establis hed the risk analysis index system for aero-engine projects.