This paper use Vine Copula to model the crude oil market in 6 regions(Brent,WTI, Dubai, Minas, Sinta, Daqing) ,to analyze the correlation between them.Discuss the changes of the structure of our country and the other 5 international crude oil market.The financial crisis has deepened the linkage between domestic and international oil markets.Daqing as the root node of the tree of the first tree,is most closely linked with other 5 crude oil markets,the interaction with Minas and Shinta is most.The influence of the Brent crude oil prices on domestic crude oil prices is greater than that of WTI crude oil price.