Abstract: Abstract Proposing underground coal mine two-dimension accurate personnel positioning method: locating substations are installed interval at certain distance in the underground gallery,in underground galleries,locating substations are arranged along one side of the gallery, and ensure that the positioning card can communicate with two neighboring locating substations at the same time.The adjacent two locating substations of any positioning card use TWR or SDS-TWR ranging method to measure the distance between the positioning card and the two locating substations respectively.Since the distance between the two locating substations is known when locating substationsare installed, based on the distance between the positioning card and the two locating substations and the distance between the two locating substations, the gallery horizontal radial distance between the positioning card and the locating substations, andthe galleryaxial distancebetween the positioning card and the locating substations are calculated, then according to the positioncoordinates of the two locating substations, calculate the two-dimensional positioncoordinates of the positioning card in underground galleries.