Hexi corridor(including three continental basins:Jiuxi,Jiudong and Mingle),developed on Caledonian fold basement,formed uniform Hexi corridor continental basin in NWW direction after the halfgrabenliked fault depression formed by Late Jurassic—Early Cretaceous tensional and tilting movements and overlay by Neogene squeezing depression.Especially, the Quaternary Indian subcontinent strongly pushed and squeezed Eurasia,which made the Qilian Mts. thrust and overthrust backward the Hexi corridor and finally the Hexi corridor continental basin formed.