Node self-localization has been the key in wireless sensor networks（WSNs）.Received signal strength indication（RSSI）-based positioning technology is the current research focus

but errors influenced by factors such as multipath

diffraction

non-line-of-sight

distance is large.Triangle centroid algorithm based on the RSSI correction is presented.It is simple

does not increase communication expense without hardware expand.The simulation results show that this algorithm greatly improved precision compared with other algorithms.It is suitable for low communication expense

low hardware requirements of wireless sensor network nodes.