Abstract: According to the main reasons on the error of DV-Hop algorithm, an improved algorithm is proposed which is based on average hop distance correction.The algorithm uses error correction value δ to modify the average hop distance, to reduce the deviation between the average hop distance and the true average hop distance.Simulation results show that, the improved algorithm has more effectively to reduce the average localization error of unknown nodes, and to improve the localization accuracy, and not require additional hardware.