Sodium butyl xanthoxanthate is a flotation reagent with strong collecting ability. It is widely used in the mixed flotation of various non-ferrous sulfide ores. The product is especially suitable for the flotation of chalcopyrite, sphalerite and pyrite. Under certain conditions, it can be used to preferentially flotation copper sulfide from iron sulfide ore, and it can also be used to collect sphalerite activated by copper sulfate.