系统研究了在乳状液膜内水相直接制备草酸稀土的方法．讨论了内水相草酸浓度、表面活性剂浓度、载体浓度、外水相酸度和外水相稀土浓度对迁移率的影响，找到了制备草酸稀土的最佳条件．草酸稀土经灼烧所得的氧化物含ＲＥ２Ｏ３＞９９．５％．与萃取法相比，此方法具有成本低、能耗少、污染程度低的特点，具有工业化前景． The method of direct preparation of rare earth oxalate in the aqueous phase of emulsion liquid membrane was systematically studied. The effects of oxalic acid concentration, surfactant concentration, carrier concentration, external aqueous phase acidity and external aqueous rare earth concentration on the mobility were discussed. The optimum conditions for preparing rare earth oxalate were found. The oxalate rare earth oxide obtained by the oxidation of RE2O3> 99.5%. Compared with the extraction method, this method has the characteristics of low cost, low energy consumption and low pollution degree, and has the industrialization prospect.