Abstract: Objective Under adverse weather conditions such as rain and snow, urban rail transit lines face safety risks due to rail surface slipperiness. If protection is carried out manually by operation personnel, it is susceptible to subjective factors, potentially resulting in delayed or improper protection, thereby affecting operations. Therefore, it is necessary to study a safety protection scheme for signaling system under wet rail conditions. Method The design concept of signaling system protection in wet rail mode is analyzed. During the signaling system design, a wet rail mode is configured within the system, and factors like the rail adhesion coefficient are considered. Based on weather conditions and the rail surface state, different levels are defined. Train movement authority is calculated using GEBR（guaranteed emergency braking rate） as the key parameter to ensure real-time safety protection. The control process and implementation plan for signaling system operation under wet rail mode, including alarm prompt, command issuance, entry and control, as well as exit are detailed. Key concerns for executing the signaling system control scheme in wet rail mode are discussed. Using Xi’an Metro Line 10 as an example, the implementation effect of the scheme is analyzed in terms of its impact on operational capacity and train operation organization. Result ＆ Conclusion Compared to manual protection, signaling system-based protection under wet rail conditions can ensure safe train operation on slippery tracks through a series of specialized train control strategies. By orderly switching modes and adjusting train volumes, the scheme can minimize track slipperiness disruption to normal operations, enhance operational safety and efficiency, thereby reducing the burden on operators.