The　dual　hesitant　fuzzy　set　is　an　efficient　mathematical　approach　to　study　imprecise,　uncertain　or　incomplete　information　or　knowledge.　In　this　paper,　we　study　the　aggregation　methods　of　the　dual　hesitant　fuzzy　information.　Several　aggregation　operators　are　proposed,　such　as　the　generalized　dual　hesitant　fuzzy　weighted　averaging　operator　(GDHFWA),　the　generalized　dual　hesitant　fuzzy　ordered　weighted　averaging　operator　(GDHFOWA)　and　the　generalized　dual　hesitant　fuzzy　hybrid　averaging　operator　(GDHFHA)　operator　for　aggregating　the　dual　hesitant　fuzzy　elements　and　establish　various　properties　of　these　operators.　A　method　is　also　proposed　for　multi-criteria　decision　making　under　dual　hesitant　fuzzy　environment　and　applied　it　to　teaching　quality　assessment.