Abstract: Taking Haerwusu Coal Mine as an engineering background, this study built a geotechnical property evaluation system, according to the exploration results. In addition, finite element method was also used in this study to analyze the deformation law and potential failure pattern. Two methods of heightening Heidaigou Rock Waste Dump were made, basing on the above research. After comparing, the second method was chosen, in which another two benches were built on 1260 bench to 1290 in section JS1. After that, we kept the width of 1260 bench as 40 m and the width of 1275 bench as 20 m. Morgenstern-Price method was also used to analyze the stability of the risen rock waste dump to make sure the safe and efficient production in Haerwusu Coal Mine.