To improve the collaboration efficiency of the networked manufacturing coalition for automobile die enterprise, the networked manufacturing system framework is put forward. Then the information model, resource model and organization structure model are studied one of the other. The information model contains three layers lengthways and the product lifecycle is divided into 5 stages on landscape; for the resource model, the resource is classified and described, the relationship between resource entities is analyzed. The participants of each member enterprise are grouped according to the task relevance in organization structure model, and collaborative discussion center is constructed for the participants to communicate. On the basis, the workflow model is then discussed, the activity in business process is described with UML, then the UML activity diagram is transformed to Petri net graph, thus the workflow model can be diagnosed and analyzed.