Abstract: With the decrease of free-milling lead-zinc sulfide ore resources， the intense demand of market for lead-zinc metal has made the progress on flotation technology of refractory lead-zinc oxide ore. In order to systematically present the progress of flotation technology of refractory lead-zinc oxide ore， the progress of sulfidation flotation technology was summarized from two aspects， including sodium sulfide vulcanization and sulfur vulcanization flotation method. The progress of combined process was summarized from two aspects， including gravity-flotation technology and dressing-metallurgy combination technology. Four aspects， including flocculating flotation， chelating agent flotation， combined collector flotation and combined inhibitor flotation were summarized based on new reagent. Finally， the development direction of flotation technology of lead-zinc oxide ore was prospected.

Key words: Lead-zinc oxide ore, Sulfidation flotation, Gravity-flotation technology, Dressing-metallurgy combination technology, Flocculating flotation, Chelating agent flotation, Combined agent