In order to meet requirement of mine safety fabrication and monitoring

in view of special environment of underground roadway and characteristics of heterogeneous wireless sensor networks（ WSNs）

put forward a solution to improve positioning precision of DV-Hop. This solution considers impact of non-uniform node distribution and deviation degree of average hop distance on positioning precision

and introduce a screening factor in selection of hop numbers and the average hop distance to get more accurate average hop count and average hop distance to improve positioning precision. Simulation results show that this solution can effectively improve positioning precision of DV-Hop algorithm

and is more suitable for localization of underground curved complex scene.