A novel LnBaCo2O5 δ-La10Si6O27 composite cathode, with continuous ion transportation from the cathode to the electrolyte, was prepared by wet impregnation method. The phase composition and microstructure of the cathode were investigated by XRD and SEM. The composite cathode showed an excellent electrocatalytic activity, which was determined by ac impedance spectroscopy, and is a potential cathode material for the intermediate temperature solid oxide fuel cell.