The right-slip Talas-Ferganhna fault plays significant roles in controlling the strata,structures and petroleum geologic features in Kashi sag since Late Triassic。During the Late Triassic-Middle Jurassic,Kuzgongsu and Kezletao fault basins probably disconnected with each other occurred in the sag,with developed rifted-style source rocks of Lower-Middle Jurassic. During the Neogene-Quaternary, the relevant strike-slip deformation of the fault occurred and controlled the petroleum traps and accumulations in Kashi sag。