Abstract: A lead-zinc ore in Inner Mongolia with zinc of 1.62%,and lead of 5.98%,contains associated silver grade is 19.60 g/t,in which main galena,sphalerite are coarsely disseminated.In order to realize the high efficient exploitation and utilization of the resources，beneficiation tests of the ore were made.Results showed that under the grinding fineness of 75% -0.074 mm,lead concentrate with lead grade of 56.65% and lead recovery of 83.85%,silver grade of 536.55 g/t and silver recovery of 65.70%,and zinc concentrate with zinc grade of 47.74%,zinc recovery rate of 90.61% and silver grade of 44.66 g/t and silver recovery of 25.86% were obtained respectively by the process of lead concentration by one roughing，two scavenging and coarse concentrate regrinding,then two cleaning,zinc concentration by one roughing，four cleaning and two scavenging，and the rest middlings back to the flow-sheet in turn.The process test above is the available process of the ore.

Key words: Lead-zinc ore, Associated silver, Galena, Sphalerite, Regrinding and recleaning of coarse concentrate