Abstract: Aiming at the problems in the existing underground personnel health monitoring system, such as the lack of physical sign monitoring dimensions, the complex wearing of sensing equipment, and the lack of unified management of health data, a health monitoring system for underground personnel based on mine smart bracelets is proposed. The system uses the mine smart bracelet to monitor the body temperature, pulse, blood pressure, blood oxygen and other physical signs of the underground personnel in real time, relies on the existing communication network of the coal mine to upload data and send messages, realize the unified management and unified presentation of the health status of the mine personnel on the server side above the mine floor, and finally achieved good results in field applications