The frequently occurring of accidents in underground coal mine demands the accurate location of mine personnel.However,the localization by the improved weighted centroid localization algorithm is not accurate.From this point of view,this paper proposes an improved centroid localization algorithm in underground coal mine based on the improved weighted centroid localization algorithm.The new algorithm takes the centroid as new anchor node and products new anchor nodes and centroid many times to conduct the localization.The simulation results show that the proposed algorithm can reduce the mean error of location and improve the accuracy of localization algorithm.