Abstract: In view of problem that traditional underground personnel monitoring system is usually used for underground personnel positioning and hard to obtain physiological indexes of underground personnel, a physiological indexes monitoring system for underground personnel based on ZigBee was designed. The system collects physiological indexes of underground personnel through multiple wireless sensors, router receives the physiological indexes data collected by the sensors, and sends it to gateway by wireless link. The gateway uploads it to ground monitoring center through Ethernet interface, so as to realize real-time monitoring of the physiological indexes of underground personnel. The test result shows that the system meets requirement of heart rate monitoring, and further improves management level of coal mine safety.