Abstract: In order to ensure the safe and effective evacuation and evacuation of underground coal mines in the event of an accident, and to ensure the safety of underground personnel, a mine underground emergency navigation system was designed. This system proposes a coal mine underground communication network framework, and a underground mobile terminal is designed for WIFI location data collection and voice navigation broadcast. The system was tested under the coal mine. The application results show that the positioning and navigation module is in good working condition, and the navigation error accuracy is controlled within 3m, which can meet the evacuation requirements of the personnel in the coal mine.