To　avoid　the　shortcomings　in　the　process　of　recovering　valuable　elements　from　NdFeB　waste,　such　as　the　complexity　of　process　and　the　waste　of　resources,　an　effective　co-precipitation　method　was　applied　to　obtain　the　composited　powder　of　Nd,　Pr,　Co　and　Fe　which　could　be　the　raw　materials　for　recycling　NdFeB　from　NdFeB　waste.　Based　on　mass　balance　principle　and　simultaneous　equilibrium　principle,　the　metal　elements　Me　(Nd,　Pr,　Co　and　Fe)　from　NdFeB　waste,　and　complexing　agent　of　OH-　and　NH3　were　chosen　to　form　the　co-precipitation　system　of　Me-OH--NH3　using　MATLAB.　The　co-precipitation　process　was　determined　by　the　results　of　lg[Me]-pH　thermodynamic　simulation.　In　addition,　the　precipitation　efficiency,　the　phase　and　the　percentage　of　valuable　elements　were　analyzed　respectively.　The　results　showed　that　the　pH　value　range　was　6~10　according　to　the　results　of　thermodynamic　simulation　and　Fe3+　was　easier　to　precipitate　than　Fe2+　in　the　system　of　Me-OH--NH3.　Compounds　of　Nd,　Pr,　Co　and　Fe　formed　with　the　pH　value　range　of　thermodynamic　simulation　and　the　percentage　of　valuable　elements　in　all　products　was　higher　than　99.4%.　In　addition,　the　precipitation　efficiencies　of　Nd,　Pr,　Co　and　Fe　were　the　highest:　98.7%,　99.9%,　93.6%　and　99.9%,　respectively,　when　the　pH　value　was　8.　The　results　also　showed　that　the　obtained　products　by　co-precipitation　method　could　be　used　as　raw　materials　for　recycling　NdFeB　in　an　efficient　way.　©,　2015,　Editorial　Office　of　Chinese　Journal　of　Rare　Metals.　All　right　reserved.