Due to the problem that the traditional manufacturing feature could not be identified quickly, an approach of manufacturing feature recognition is presented based on graph and subgraph isomorphism algorithm. By extracting the geometric and topological information of 3D part model, the paper constructs a weighted attributed adjacency graph to describe it accurately. In order to establish the libraries of manufacturing feature, the storage structure of the file data is defined. The system could recognize and match common manufacturing feature combined with the subgraph isomorphism algorithm and relevant decision rules. The secondary development is conducted under the platform of VS2010 and the recognition results are displayed finally with a windowing interface to verify the validity of the method.