NdFeB　is　widely　used　in　various　fields　owing　to　its　excellent　magnetic　properties.　It　would　produce　about　40%　waste　in　the　production　process　of　NdFeB.　The　rare　earth　elements　were　extracted　from　the　heavily　oxidized　NdFeB　waste.　Based　on　the　huge　difference　in　solubility　between　rare　earth　(RE)　oxalates　and　ferrous　oxalate,　RE　and　impurity　elements　were　separated　and　the　RE　oxalates　were　obtained　by　dropping　oxalic　acid　into　the　solution　of　NdFeB　waste.　The　effects　of　reaction　temperature,　pH　value　and　the　amount　of　oxalic　acid　on　the　experimental　results　were　studied.　Thermal　gravimetric　analysis　(TGA)　was　used　to　analyze　the　process　and　condition　of　RE　oxalate　decomposition.　The　phases　and　the　element　content　were　detected　by　X-ray　diffraction　(XRD)　and　X-ray　fluorescence　(XRF),　respectively.　The　results　indicated　that　RE　oxalates　were　well　precipitated　at　80　with　the　pH　value　of　1.5~2.0,　and　the　ratio　of　oxalic　acid　of　1.5.　The　mixed　RE　oxides　with　a　high　content　of　99.27%　were　obtained　by　decomposing　the　precipitated　RE　oxalates　at　800　for　1　h　after　drying.　Thus,　this　method　could　efficiently　separate　the　rare　earth　elements　and　iron,　promoting　recycling　the　waste.　©,　2014,　Editorial　Office　of　Chinese　Journal　of　Rare　Metals.　All　right　reserved.