In WSN anchor node is responsible for receiving GPS signal,but its life is energy constrained.In order to improve the life cycle and the positioning accuracy of sensor networks,UKF-RSS online modeling based WSN location tracking algorithm is proposed,to achieve efficient resource management and use patterns.The algorithm mainly includes target prediction and target location.The UKF algorithm is used to predict the next location of the target node,and select the last few anchor nodes of the prediction positi...