The Pr-Zr complex oxides were prepared by coprecipitation and the effects of the synthesis conditions on the formation of perfect solid solution were investigated. The catalytic performance of methane partial oxidation supported on the prepared samples was also studied. The Pr-Zr perfect solid solution could be synthesized under the conditions of precipitation temperature 20 oC, precipitation pH 12 and calcination temperature 800 oC through Pr(NO3)3·6H2O and Zr(NO3)4. The formation of solid solution could improve oxidative activity of the Pr-Zr due to the high oxygen mobility.