According to the structural characteristics of petroliferous basin can be divided into three major basins：Craton basins，Rift basins and Foreland basins，thousands of which developed in the global. The distribution of oil-gas is discussed in the three major basins. Oil and gas is mainly distributed in the paleo uplift，paleo slope，regional unconformity，fault belt of the Craton basins，and is also distributed in the structural belt，steep slope belt，gentle slope belt of the Rift basins and in the fault-folded belts，slope belt，overthrust belt，depression belt of the Foreland basins，which proved that it has important guiding significance in the oil-gas exploration.