Abstract: The process mineralogy was studied on hornstone and skarn copper-molybdenum ores and the copper and molybdenum concentrates was obtained by separating flotationin Jiama, Xizang. The research shows that the hornstone copper-molybdenum ore contains Cu 0.38% and Mo 0.01%, and the skarn copper-molybdenum ore contains Cu 0.85% and Mo 0.03%. Mo is mainly lost in the form of continuous growth with copper minerals in the copper concentrate. The impurity elements in the molybdenum concentrate mainly enter into the molybdenum concentrate in the form of continuous growth with molybdenite or fine particles. The research results provide theoretical guidance for making full use of the ore resources and optimizing the sorting process.