Abstract: With synthetic studies of informations of geology, geophysics and dri-lling, the author thought that Leshan-Longnusi uplift was influenced by several tectonic movements during Caledonian period and was controlled by border faults. It experienced erosion at the end of Guangxi movement, thus became fixed in the form of sedimentary-erosional palaeo-uplift. There are favourable conditions for oil and gas generation in lower palaeozoic of the area, and due to frequent transgressions and regressions, numerical sedimenting gaps and faulting activities, good reservoir rocks and various lithological traps, slight unconformitive traps and burial traps would be found on the southeast of the uplift, which confirmed the area is promissing for petroleum exploration.