This paper analyzed the current process planning based on 3D feature model, and pointed out the exiting disadvantages. The framework and key technologies that play a vital role in process planning were issued. A uniform manufacturing model, which was built on component model by offsetting surface features and volumetric features. It implemented the typical machining features recognition and extraction, including visional entity and conceal technological attribute. It also set up hierarchy planning model. Under the support of these theories, a feature-oriented process planning generation system based on Solidworks CAD platform was developed. With the testing work on the interrelated examples, the software system has validated the feasibility and practicability of the method in this paper, which will enrich the way to make stock model in existent CAM software system. It has significant meaning to promote the integration of CAD/CAPP.