Abstract: Mineral processing technology and technological mineralogy were studied complex polymetallic lead-copper-zinc sulfide ores from Inner Mongolia. Findings show that the valuable elements in the ore are Cu, Pb, Zn and Ag, and the copper, lead and zinc minerals are metasomatized and wrapped each other, among which galena and chalcopyrite are wrapped, and the particle size of the wrapped galena is not uniform. Galena and sphalerite are mostly in continuous relationship, and the contact surface between them is smooth and straight, which is easy to separate. The silver mineral is associated with these metal minerals, so the ores was used by the technological process of mixed flotation of copper and lead, separation of copper and lead and zinc flotation from tailings. Finally, a total of 3 concentrate products were obtained. In the copper concentrate, the average grades of Cu and Ag were 18.41% and 594.82 g/t with 86.53% and 25.30% recovery rates. In the lead concentrate, the average grades of Pb and Ag were 62.70% and 428.05 g/t with 85.01% and 54.62% recovery rates. In the zinc concentrate, the average grades of Zn and Ag were 28.12% and 165.75 g/t with 59.99% and 4.80% recovery rates; The total recovery of silver reached 84.72%, which realized the comprehensive recovery of valuable elements in ore.