Traditional APIT test localization algorithm is widely used in static node location.An improved APIT algorithm is proposed combined with particle filter to promote it into node dynamic location.This algorithm determines the sample area according to node mobility and the APIT Polygon overlap area

and filter samples through the target node’s received signal strength indication（RSSI）sequence values

in order that mathematical expectation of the sample values could converge to that of the target node.Simulation results show that the algorithm efficently reduce the sampling area and the location energy consumption.To a certain extent

more accurately realize dynamic positioning compared with MCL and MCB algorithm.