Abstract: This article proposes a design method for a leakage alarm control system for fire water pipelines entering substations. The system is mainly divided into two parts: detection control and remote alarm control. The former uses the ATmega328 microcontroller as the control chip, while the latter uses the auxiliary control system platform in the substation for secondary development. The two communicate through the ZigBee wireless communication module. The detection and control part collects the dynamic changes of water flow inside the pipeline through a water flow sensor to reflect pipeline abnormalities, and uploads them to the remote alarm control part through the ZigBee wireless communication module; Simultaneously receiving remote instructions from operation and maintenance personnel to control the solenoid valve and promptly close the pipeline.