The orebody in Fengshan Copper Mine is a large-scale skarn deposit of copper-molybdenum. As production grows, the recovery of molybdenum poses an increasingly pressing issue. In order to seek a rational flow sheet and an appropriate reagent adding system for molybdenum recovery, numerous small tests have been carried out based on the analysis of the molybdenum content in the out-of-mine ore and the composition mineragraphy. A flow sheet and reagent adding system have been determined for molybdenum recovery based on those small tests. Semi-industrial tests have been carried out with the flow sheet and good technical and economic indices have been obtained.