Abstract: In recent years, China National Offshore Oil Corporation has actively carried out digital transformation and introduced a real-time intelligent drilling auxiliary decision-making technology system. Based on this system, key digital technologies such as real-time statistical analysis of operating efficiency, simulation and prediction of friction, torque and hydraulic parameters, and real-time monitoring of formation pressure based on multi-source information for integration of geology and engineering have been formed. It provids real-time data monitoring, engineering risk simulation and operation plan optimization for high difficult and complex wells , and has good application effects. Combining the current status, high-level artificial intelligence real-time auxiliary decision-making technology research is needed in the future, independent research and development of engineering software should be carried out, and the use of seismic, drilling, mud logging, logging and other data to establish a more comprehensive and intelligent geology engineering-integrated drilling engineering management platform, which can effectively identify outstanding drilling engineering problems such as stuck, overflow, well wall collapse, lost circulation, etc., and finally form an intelligent, safe and efficient drilling technology based on geology-engineering-information technology integration of historical data and real-time data linkage.