The supplier is considered to be attractive under green supply chain management; supplier evaluation is also confronted with a\nserious challenge. Based on this background, this paper studies green supplier evaluation and selection with weights unknown in\nhesitant fuzzy sets and presents evaluation indexes by the DEMATEL method. On the basis of the Euclidean distance, hesitancy\ndegree is used to construct the improved type signed distance. At last, the paper calculates relative closeness to rank green suppliers\nby the improved TOPSISmethod and compares the results of the traditional algorithmand SAWmethod. The result of the example\nshows that the algorithm has practicability and a dipartite degree.
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