本发明涉及一种以氯化镧为原料低温电沉积制备金属镧的方法，属于稀土金属低温提取领域。一种以氯化镧为原料低温电沉积制备金属镧的方法，包括下述工艺步骤：室温下，将硝酸锂溶于DMI中得硝酸锂的DMI电解液，将硝酸锂的DMI电解液置于电解槽中，再向其中加入无水氯化镧，在电解槽内搅拌混合，使之形成均一透明体系控制整个体系温度在25～75℃，电解电压范围‑2.0～‑2.5V vs Ag；电解过程中，每隔一段时间向电解槽内补加无水氯化镧，控制氯化镧摩尔浓度为起始浓度±3％。本发明所述方法在高效制备稀土金属镧的同时，显著降低能耗和生产成本。
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