As the problems of lower localization accuracy appeared in the traditional DV-Hop algorithm，theauthor analyzed three main factors that influence the localization accuracy of original DV-Hop algorithm whichstarted from the calculation of the average jump distance in algorithm and the calculation of node coordinates. Theauthor then proposed the calculation method of average jump distance based on the weighted correction of the ＲSSI( Ｒeceive Signal Strength Indicator ) and the calculation method of unknown node coordinates based on thecorrection of the total least squares ( TLS) . The simulation result shows that compared to the traditional DV-Hopalgorithm，the accuracy of the improved algorithm increased by about 30% in distance measurement as well as roseapproximately by 35% in relative localization precision.