Abstract: In the light of comprehensive geophysical method,the authors indicate that the San-shui basin is a fault one controlled by faulting.The basement of the basin consists of three depressions and four uplifts,There are three kinds of different lithologies-the Sinian metamorphic rocks,the Paleozoic clastic rocks and the upper Paleozoic and Mesozoic clastic rocks and limestones,Baoyue and its surrounding are the most favorable area for oil andgas accumulation,and the southern depression of the basin is a beneficial area for exploration.