Abstract: Aero-engine design involves a number of software packages, to which the integration of design data with application system is of highly technological and industrial significance. The component-based COM is introduced in integrating the multidisciplinary computing packages applicable to the design of aero-gas turbine, with the agent objects used to pack a number of aerodynamic, thermodynamic and structural computing packages so as to provide the trans-processing request-response service on the basis of COM call mechanism. The COM-based integration system provides a variety of functions, such as computing package registration, running control, parameter mapping, design specification management and knowledge management. The system can also support the visualized design simulation and on-line collaboration among single project designers, thus improving the efficiency and quality of design and shortening effectively the time required for design.