[en] The method of production of aluminium-lanthanum alloy, the efficiency of which is increased due to the improvement in the cathode application efficiency, is suggested. The method consists of lanthanum electrodeposition at 690-700 deg C from the equimolar mixture of potassium and sodium chlorides with lanthanum trichloride on a liquid aluminium cathode. Lanthanum electrodeposition is conducted at 2.76-2.78 V cathode potential relative to chlorine reference electrode at 710-730 Axh/kg quantity of electricity of the initial cathode mass