Abstract: In order to improve the accuracy of underground personnel positioning and ensure the rapid positioning of underground personnel to achieve rapid rescue and daily supervision, this paper calculates reference nodes and positioning nodes by receiving signal strength value (RSSI) according to the relevance of wireless access points.The distance is proposed, and the downhole personnel positioning technology based on the improved RSSI weighted centroid algorithm is proposed to eliminate the interference of the human factors on the path loss determination in the traditional RSSI positioning algorithm.Based on the actual roadway environment, the simulation of personnel information location technology based on RSSI weighted centroid algorithm and improved RSSI weighted centroid algorithm is carried out.The results show that the improved RSSI weighted centroid algorithm can increase the accuracy and reliability of downhole personnel positioning, and is more suitable for downhole positioning system.