Pr1.8Ba0.2Ni0.5Cu0.4Co0.1O4+δ cathode material with Ruddlesden-Popper phase was prepared by sol-gel method, which was evaluated the reduction performance in an oxidizing atmosphere as cathode in for proton conductor solid oxide fuel cells. Crystal structure, physical properties and electrochemical was concluded that the impedances at 750 ℃ in air and in aqueous argon are 0.047 Ω?cm2 and 1.161 Ω?cm2, respectively. The formation of oxygen vacancies and proton defects in the structure facilitates the conduction of ions and protons, and the oxygen reduction capacity was improved compared with the materials without cobalt doping.