Abstract: La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) precursor powder was synthesized by the urea combustion method as cathode catalyst. From the XRD patterns，fine powders with perovskite structure were obtained by calcining at 800 ℃. At 400～900 ℃，LSCF powder had high conductivity，which satisfied the needs of the cathode of solid oxide fuel cell. The electrochemistry performance and desulfurization performance of the single solid oxide fuel cell，(CoS-Mo2S)/BaCe0.9-xZrxY0.1O3(BCZY)/LSCF，with the cathode catalyst LSCF were measured at different temperatures while H2S was the fuel. The results showed that the maximum current density，maximum power density and H2S removal were improved by increasing temperature. At 850℃，the maximum current density of the fuel cell was 39.52 mA·cm－2 and the maximum power density was 6.38 mW·cm－2，when the flow rate of H2S was 50 mL/min. The removal of H2S was 72% at 900℃.