Al was prepared by a new method in molten salt at low temperature.Sintered alumina pellets were used as cathode;graphite rod was employed as anode;and the molten CaCl2-NaCl was the electrolyte.A constant 3.2 V voltage was applied in this experiment,and oxygen in solid alumina cathode was reduced by direct electrochemical deoxidation at 550℃.In this process,the current gradually decreased with increasing time and the alumina pellets became grey and porous.The metallic particles were obtained and characterized by XRD(X-ray diffraction) and SEM(scanning electron microscopy). Al was prepared by a new method in molten salt at low temperature. Injected alumina pellets were used as cathode; graphite rod was employed as anode; and the molten CaCl2-NaCl was the electrolyte. A constant 3.2 V voltage was applied in this experiment, and oxygen in solid alumina cathode was reduced by direct electrochemical deoxidation at 550 ° C. In this process, the current gradually decreased with increasing time and the alumina pellets became gray and porous. The metallic particles were obtained and characterized by XRD (X-ray diffraction ) and SEM (scanning electron microscopy).