Abstract: The Baise Basin in Guangxi Province is a Tertiary fault-depressed hydrocarbon basin of continental facies developed in the Triassic basal of marine facies.The essential elements of petroleum system(from source to trap) are thoroughly studied,and then ‘four charts and one table' are illustrated to express the basin explicitly so as to help further hydrocarbon exploration and development.There are two sets of source rocks,namely the Nadu Formation and the Baigang Formation,with fine reservoir and(caprocks,) forming good assemblage of generation,reservation and capsulation,yet the tectonic activities subsequently reconstructed the basin preservation greatly,therefore hydrocarbon exploration in the basin is far from satisfaction.