Aimed at the problem that in the beacon nodes randomly distributed environment

reference node selection by traditional difference correction localization algorithm is too single

which cause that ranging modification coefficient has big error

propose a PSO localization algorithm based on joint ranging modification of neighbor node. The algorithm uses a joint ranging modification algorithm of neighbor node to get the modified distance from the unknown node to each beacon node

and then use an improved PSO algorithm to optimize the positioning result

obtain estimated position of unknown node. Simulation results show that the proposed algorithm has obvious improvement of positioning precision and achieve good stability

compared with traditional positioning algorithm.