Wireless sensor networks（WSNs） 3D DV-Hop localization algorithm on hillside is studied.By theory and simulation comparison analysis

application of typical 3D DV-Hop algorithm on hillside can cause large positioning error and unstable

it can not meet the demand of practical application.3D DV-Hop algorithm based on topographic correction is put forward.Node positioning precision is high

average variance of relatively wireless range is about 30 %

and it is not influenced by hillside inclination angle

communication radius and anchor node ratio

and fully meets the needs of practical application.