According to the engineering demands of the manufacturability evaluation, the Aero engine blade part information model built up based on the generalized feature and STEP standard, and based on the secondary development of UG software, a CAD system based on features is realized. The system can realize automatic feature recognition. Based on the part information model that has been built up, the system can generate STEP document automatically, can provide various blade part information for the subsequent manufacturability evaluation of the design. This helps to realize the integration and parallel of CAD and the subsequent process. The CAD/CPAPP/DFM information integration can be realized by using the blade part information that has been built up.