Received signal strength indication（ RSSI） is a kind of ranging-based localization approach based on relationship between signal loss and distance

but signal attenuation relation is inconsistent due to influence of noise

propagation model and obstacles

the farther the distance is

the lower the accuracy is. Put forward a kind of inverse distance weighted threshold algorithm

which reject the point that is far beyond the scope of threshold

the reserved point is weighted to achieve precision positioning. The experimental simulation results verify the effectiveness of the proposed algorithm to improve positioning precision

and reduce positioning error rate.