Treatment method for industrial wastewater of rare earth

The invention discloses a treatment method for industrial wastewater of rare earth. The method comprises the treatment of sodium salt wastewater, the treatment of magnesium salt wastewater, the treatment of carbonate precipitate mother liquid, the treatment of oxalic acid precipitate mother liquid, and the treatment of other industrial wastewater, wherein other industrial wastewater includes dolomite pretreating wastewater, oxalic acid precipitate washing water, carbonate precipitate washing water, pure water station preparation wastewater, boiler wastewater and smoke purifying system wastewater. The method is simple and feasible in process, low in cost, good in treatment effect, high in treatment efficiency, and low in energy consumption; waste generated in each process can be collected, treated and recycled based on the quality, so that zero pollution emission of sodium salt, magnesium salt, carbonate precipitate mother liquid and oxalic acid precipitate mother liquid generated in the extraction of the rare