Abstract: Objective: Currently, the metro station fire water supply for each station is individually equipped with fire water sources, it is costly and occupies underground space. To optimize the fire water supply mode and appropriately utilize the limited underground space, a fire water supply mode for metro station cluster is proposed. Method: The fire water supply mode for metro station cluster considers multiple stations and intervals as a single fire unit, and adopts a temporary highpressure fire water supply system to ensure the safety of entire fire protection unit. The calculation method for pipeline pressure loss is introduced, and the influence of line slope on the farthest service distance of fire pump room is analyzed. The calculation method and process for determining the appropriate scale of fire water supply for metro station cluster are explained. Suggestions are put forward for alarm control, setting of pump coupling devices, and establishment of neighboring station fire control rooms under this mode. Result & Conclusion: The dynamic pressure at the hydrant outlet has a significant impact on fire water supply scale for metro station cluster. It is recommended to install pressure sensors, electromagnetic flow meters and pressure switches to monitor pipeline network operation and ensure fire protection system safety and stability.