the application of wireless sensor network fields covers the military, health care, environmental protection and transportation, test because it involves a size, power and cost some factors limit, popular now global positioning system and wireless sensor network node location is not complete. So, this paper discusses the wireless sensor network with the localization algorithm has a wide application value and the very important theoretical value. This article deep research of wireless sensor network IAPIT location algorithm, this article is not the same node communication radius and anchor node proportion, the simulation IAPIT algorithm and APIT discussed the performance of the algorithm. From the experiment can see, APIT algorithm and IAPIT algorithm is, greatly increases the location coverage, a wireless sensor network positioning accuracy of basic can meet the needs of the application.