Abstract: In order to meet mine safety monitoring and personnel requirements of position, an improved DV-Hop algorithm is proposed. The main features of this approach is to consider the use of the position marked the relationship between beacon nodes and the geometric topological relationship between beacon nodes with unknown nodes in the positioning process, then based on certain principles to select the beacon nodes which are involved in positioning. This improved method of positioning compared to the original DV-Hop algorithm has better positioning accuracy and its applicability is also become more and more extensive.