FIELD: mining. SUBSTANCE: sulfide copper-zinc ores floatation methods provides for production of bulk copper-zinc concentrate with following its selection in lime medium in presence of collector, foamer and depressing reactant of zinc sulfides, composed of mixture of sulfuric sodium and zinc vitriol, with extraction of copper concentrate in foam product. During selection they additional introduce in mixture as reactant polyethylenepolyaminocarbamideguanidine of general formula 
, that is product of chemical reaction of polyethylenepolyamine with carbamide. Polyethylenepolyaminocarbamideguanidine is introduced in amount of 8 20 g/t of ore. EFFECT: increased productivity of copper-zinc ores dressing by floatation. 2 cl, 1 dwg, 1 tbl