Abstract: This article aims to study the electrical fire protection system of civil buildings based on fire detector linkage technology, in order to improve the accuracy and response speed of fire warning. Through multi-sensor information fusion technology, the system can monitor environmental parameters in real-time and use intelligent algorithms from the central control unit for fire detection. After confirming the fire, the system automatically initiates a series of linkage measures, such as alarms, power cuts, and activation of firefighting equipment. The experimental results show that the system outperforms traditional systems in terms of fault recognition time, leakage current detection accuracy, and temperature monitoring error in electrical fires, significantly improving the efficiency and reliability of fire prevention and control.