Abstract: Aimed at the ore characteristics in Inner Mongolia,the flotation flowsheet of one-stage coarse grinding-bulk flotation of copper and molybdenum-regrinding of bulk concentrate-separation of copper and molybdenum was determined. effected.Experiment uses adapt flowsheet and condition,processing molybdenum and copper crude of crude grade being 0.066 and 0.03,the better index of molybdenum grade of concentrate is 51.68%,the copper gradef of concentrate is 12.60%, Molybdenum ecovery is 74.33% is got.