Abstarct: 1,2,3-triazoles have many biological properties and industrial applications; which is why new methods for the synthesis of this class of compounds is of great importance. In this study, a new heterogeneous catalyst was prepared from the reaction of chloromethylated polystyrene with sodium azide in DMF, followed by reaction with 2-methyl-3-butyne-2-ol and copper (II) acetate and sodium ascorbate. The catalyst structure was approved by ICP, CHN and FT-IR analysis. The heterogeneous catalyst was used for the synthesis of 1,2,3-triazoles from the Multi-component reaction of amines, propargyl bromide and aryl azids in H2O/EtOH. Mild reaction conditions, high yield, easy purification and reusability of the catalyst are the advantages of this method.