Abstract: In the management academic community, the research of real enterprise's supply chain has developed a knowledge system. However, the supply chain research which is related with virtual enterprise is just getting started. Typical virtual enterprises are selected as research cases, the classical grounded theory methodology is used, the method of cognitive map is integrated,and the first-hand interview contents are applied as data in order to deeply research the dynamic mechanism of supply chain in virtual enterprises.
In the classical grounded methodology, there is a need to code from the first-hand interview data of the targeted enterprises with the coding technology, to explore the logic line in the special operation phenomenon to find out the hidden principles. Additionally, the cognitive method is applied to interlink the factors of formatting the virtual enterprise's supply chain in the stage of open coding. Another side, it is founded that the supply chain formation process of a virtual enterprise changes from simplicity to complexity under the effect of the brand influence force and the supply chain control force, so as to cause the supply chain configuration to change from "Building Blocks" to the "Building Blocks" Model.
Above all, the discoveries and conclusions of this article fill the gap of the research between the virtual enterprise and supply chain, and put forward the foundation models for the further research. In the practice, guidance be provided for the enterprises to choose the right way to turn into a virtual enterprise and make its supply chain configuration better to obtain better performance.

Key words: the classical grounded theory, virtual enterprise supply chain, "Building Blocks", model