Abstract: In order to make full use of the passive detection features of the PIR and broaden the scope that the PIR applied in the field of target localization, one method of using PIR for moving targets (human) location theory was proposed based on the pyroelectric signal peak-peak value time difference method which was used to achieve the target's distance. And for the shortage of a single node's localization in blind area, reasonable optical lenses and ingenious machinery structure have been selected with good design, so the moving target's multipoint repeatedly localization was easily realized. According to the multi-nodes optimal layout principles, the different nodes optimal layout model was obtained respectively through discussing the optimal arrangement double-nodes. Finally, an experiment was implemented to verify the effectiveness and accuracy about moving target more position points localization under the two nodes optimal layout model. This method breaks the pyroelectric sensor hardware routine use, improving the range of use for PIR.