It will be no damage for small non-metallic inclusions by non-aqueous electrolytic technique. However, there are some unsolved problems: the interference of by-product, the corrosion of small inclusions and the low efficiency. PH value, colloid and electrolytic efficiency were discussed in this paper to optimizing electrolysis parameters. Finally, ultrafine non-metallic inclusions were extracted successfully with high efficiency. The results showed that complex oxides and sulfides were kept well and the contents of by-product were reduced distinctly. Three dimensional morphology inclusions were observed with clear background.