Node positioning method and device of wireless sensor network and medium

The invention discloses a node positioning method and device for a wireless sensor network, and a medium, and the method comprises the steps: building conventional routing communication through employing a low-power-consumption single communication radius, and estimating a one-hop segment distance through employing the overlapping area between adjacent nodes in the single communication radius and the number of common nodes; two-hop and three-hop segment distances are estimated by using a high-power-consumption double communication radius, and node energy consumption is reduced by using a linear fitting method for an area and distance relation in an estimation process. According to the method, a plurality of first-hop distance information, second-hop distance information and third-hop distance information contained in the first four hops are determined, geometric structure categories of the forward three-hop broken line segment and the reverse three-hop broken line segment are judged through the Euler four-poi