Abstract: In this paper, multi-agent is used for the construction of integrated framework of virtual enterprise in which an agent represents individual member-enterprise of the virtual enterprise, accordingly, the virtual enterprise is represented by multi-agent-system. The agent general structure is emphasized which consists of core level, internal interface and communication level. The core level is the legacy system of an enterprise to keep its autonomy, and the communication level realizes the cooperation among enterprises by supporting the interactions of them, and internal interface makes it available to exchange informations between the core level and the communication level of an agent. The integrated framework of virtual enterprise makes the virtual enterprise work as a single enterprise, and it realizes the reusable, the reconfiguration and the scalable of virtual enterprise, meanwhile, the integrated framework also makes it possible that an enterprise can participate in several virtual enterprises at the same time according to the real requirements.