The development and production of offshore oil have long been accompanied by high operational risks， and the quality of operational safety risk analysis has a direct impact on preventing production safety accidents. The purpose of this article is to introduce the construction practice of China National Offshore Oil Corporation's intelligent system for safety analysis of offshore oil fields， clarify the key points of digital and intelligent construction of oil field safety risk analysis from four aspects： business informatization， resource digitization， data standardization， and business intelligence， analyze the advantages of using intelligent management and analysis systems to improve the safety level of offshore operations， and provide reference for offshore oil field enterprises to explore the path of scientific and technological development.