Abstract: Wind speed prediction is widely concerned in wind power industry because of its wide application in wind power generation.In order to predict wind speed more accurately,a new method is proposed in this paper. First,the visibility graph is used to map the wind speed series to a directed weighted network,the similarity matrix of nodes in the network is determined by calculating the similarity of neighbor time nodes and combining the shortest path method,then on the basis of the node similarity analysis of directed weighted network,the adjacent prediction method and linear approximation method are combined to predict. In the prediction experiment,the applicability and predictability of this method are illustrated by comparing the errors with other models. This method can predict wind speed more accurately and provide reference for power system operation.