Since permanent magnet, the demand of permanent increase year by year. Permanent magnet have applied in multiple area, like wind turbine, magnetic resonance imaging (MRI), DVD players and voice coil motor (VCM). In Taiwan, the process of VCM product over 10 tons of Nd-contained slurry per year without suitable treatment. The residual of leaching solution, which contained Nd, Fe, B in solution. Compare different type of extractant, like D2EHPA, Cyanex272, Alamine336. We’ll discuss the initial pH value, organic-aqua ratio, extractant concentration and concentration of TBP as a synergetic extractant to get the optimal parameter to separate Fe and Nd at first. Next, by different kind of acid and different concentration of acid to get the optimal parameter to backwash extractor metal to aqua phase. Using oxalic acid to obtain oxalic neodymium and separate the other matal. Finally, we could obtain over 90% recovery rate of Nd.