Method for preparing samarium-iron alloy

The invention discloses a method for preparing a samarium-iron alloy. The method comprises the following steps that firstly, mixing is conducted, raw materials are prepared according to the proportionand include anhydrous halogenated samarium, metal iron or anhydrous halogenated iron and a reducing agent, the usage amount proportion of the anhydrous halogenated samarium and the metal iron or anhydrous halogenated iron is determined according to the samarium-iron alloy chemometry requirement, the reducing agent is used for reducing the anhydrous halogenated samarium, and when the anhydrous halogenated iron is adopted, the reducing agent is used for reducing the anhydrous halogenated iron; after being evenly mixed, the raw materials are arranged in a crucible; and secondly, samarium-iron alloy preparing is conducted, the crucible in the first step is placed in a vacuum induction furnace, inert gas is adopted as reaction protective gas, the temperature is increased to the temperature which is needed by the react