Sustainable supply chain management is a new approach in the discussion of supply chain management, which is considered based on the concepts of sustainability triangle (Economic, Environmental, Social). In the meantime, choosing a sustainable supplier is a strategic key to success in managing the sustainable supply chain of organizations. Choosing the best supplier according to different and sometimes conflicting criteria complicates the problem that using multi-criteria decision making methods is one of the best ways to solve these problems. On the other hand, the choice of supplier is strongly dependent on the opinion of decision makers, and due to the incompleteness of available information, we face a kind of uncertainty.

 In this paper, the issue of choosing a sustainable supplier in Cement Company is examined. To do this, the combined SWARA and CoCoSo fuzzy approach was used to weight the criteria and rank the suppliers. In the first stage, after collecting the criteria for selecting a sustainable supplier based on the research literature, the criteria were weighted using experts and the F-SWARA method.

The weighting results showed that the economic dimension (0.555) had the highest importance and the environmental (0.296) and social dimensions (0.146) were in the second and third places. Among the criteria, product price (0.284), environmental standards (0.154) and product quality (0.140) gained the highest weight, respectively. Supplier ratings were then calculated using the new F-CoCoSo method, and supplier ratings were obtained for final decision.

According to the criteria of a sustainable supply chain in this study, managers and owners of various industries and businesses according to the findings of this study can choose the right supplier who lives from all three economic dimensions. Environmentally and socially appropriate, take steps and enjoy its benefits.