Aiming at the low positioning accuracy of distance vector hop (DV-Hop) algorithm in wireless sensor networks, a DV-Hop positioning algorithm based on double communication radius and improved gray wolf algorithm is proposed in this paper. First, the position of the beacon node is broadcast with the double communication radius, and the hop number between the beacon node and the unknown node is obtained, so as to get the distance between the beacon node and the unknown node. Then, an improved gray wolf algorithm is used to estimate the location of unknown nodes. Simulation results show that the improved DV-Hop algorithm has better positioning accuracy and stability than the traditional DV-Hop algorithm and similar algorithms.