Grouping a virtual enterprise is a key technique of agile manufacturing formation.By analyzing the elements of the enterprise's resource and requirements and making use of the concept of rescouce index and the mothed of fuzzy judgement, the model of enterprise's resource is presented. The communication structure of collaborative work team is built by using the network infrastructure of COBRA .Also, team grouping process of collaborative work is discussed.Considering the enterprise's resource demands, the strategy of selecting partners based on the optimzation of enterprises's resource is proposed.