Abstract: The oil and gas exploration efforts in Sichuan basin have been more than half a century. As a mature exploration or high mature basin, eight industrial/commercial gas reservoirs and one oil reservoir were found from the Late Proterozoic Sinian system to the Jurassic red bed, people called it“full basin gas and half pot of oil”, so Sichuan basin is a unique basin among petroleum basins in China. The discoveries and experiences of the oil and gas explorations are worth reviewing and summarizing, the hydrocarbon accumulation characteristics and prospects are worthy of probe and outlook, so as to strengthen the confidence that more oil and gas resources will be found. According to the experiences of the researches and explorations of the oil and gas fields in Sichuan basin, the authors consulted a large number of relevant information, analyzed the main characteristics and current situations of various industrial/commercial oil and gas reservoirs and accumulation, and put forward some conclusions and suggestions that Sichuan basin still has great oil and gas prospects, their exploration is promising, etc., which could be as references for the colleagues and decision makers