Based on the aero-engine simulation work development planning, this paper analyzed the requirement of aero-engine manufacturing process simulation technology from manufacturing dimensions. It proposed to establish the technological system of aero-engine manufacturing process simulation following some principles. It provided a preliminary framework of the technological system based on demands corresponding to five kinds of difficult stages. Furthermore, it analyzed the key technologies should be broken through recently. The research is useful to implementing the development planning and directing the development of aero-engine manufacturing process simulation technology.