Abstract: Using evidence weight method, the authors selected tectonic activities, hydrocarbon abundance and thickness of source rocks, level of reservoir, complexity of reservoir, degree of mineralization of formation water as the evidence layers to evaluate the favorable zones of lower Palaeozoic pools at the north edge of the middle and lower Yangtze area. Finally, integrated with the study of petroleum geology of the area, the north of the Sichuan Basin, west area of Hubei and east area of Chongqing, and parts of the lower Yangtze area are considered as the most profitable areas of oil exploration at the north edge of lower and middle Yangtze area.

Key words: north edge of the middle and lower Yangtze area, oil geological anomaly, evidence weight method