Abstract: It plays a vital role in runaway guidance and post-disaster rescue in mine shaft accidents to establish a stable,effective,and high-precision personnel locating system and algorithm.Based on the ultra-band locating ranging system,the study carries out tests on indoor asymmetric bilateral two-way ranging.In the test,particle swarm optimization,Taylor series iteration,and similar smart algorithms are used to complete the target location,in hope that a more precise location analysis is obtained.Compared to conventional Wi-Fi communication systems and frequency-emission personnel location identification methods,the method,as well as guaranteeing real-time information,can effectively and accurately provide the location of troubled personnel and their peripheral terrain status.Besides,the precision of locating reaches the level within centimeters,which realizes precise underground location and provides technical support for underground rescue.