Abstract: A molybdenite in Xinjiang contains 0.12 % molybdenum and 0.009 % copper.In the case that a trace amount of chalcopyrite and molybdenite intergrow in the ore,to reduce the copper content in the molybdenum concentrate and improve the grade and recovery of molybdenum concentrate,the process of copper-molybdenum bulk flotation-rough concentrate regrinding-copper inhibition and molybdenum flotation was studied by experiment.The results show that with the process parameters obtained in the test,the grade of the molybdenum concentrate obtained is 49.55 %,the molybdenum recovery rate is 82.41 %;the rough copper concentrate contains 0.25 % copper and 2.45 g/t gold,and the copper and gold recovery rates are 89.85 % and 63.12 % respectively;the 0.14 g/t gold in raw ore is mainly enriched in the rough copper concentrate.While the experiment effectively recovers the molybdenum,copper,and gold are comprehensively recovered.