The construction of subway tunnels has always been a key link in urban infrastructure construction. However, it is also accompanied by various construction risks and safety challenges. A safety management technology for subway tunnel construction is proposed to address the safety management issues of subway tunnels. By deploying real-time monitoring systems and integrating historical data, descriptive and inferential statistical analysis of safety performance is conducted. Failure mode impact analysis is used to identify potential risks, and the analytic hierarchy process is applied to comprehensively evaluate safety management factors. The technical logic of the research emphasizes data-driven, systematic analysis, and predictive prevention, and improves the adaptability of management measures through dynamic adjustment mechanisms, providing scientific basis and practical guidance for tunnel safety management. In the calculation time test, the calculation time of the research method was maintained at 296 ms for 100 engineering projects. When calculating the expected implementation cost, the highest implementation cost of the research method was only 2468K pesos when it reached 320 days. In the project progress analysis of safety management, the maximum completion time of the research method was only 435 days. This indicates that the research method can effectively manage the safety of subway tunnels. It has better implementation results and lower negative impacts on the construction period.