A　series　of　CexZr1-xO2　(0　＜=　x　＜=　1)　solid　solutions　were　prepared　by　uniformity　precipitation　using　urea　as　the　precipitant.　Supported　Pd　catalyst　was　prepared　by　using　the　above　solid　solution　as　the　carrier.　The　effect　of　the　carriers　surface　basicity　on　the　sintering　behavior　of　Pd　in　Pd/CexZr1-xO2　catalyst　was　investigated　by　XRD,　low　temperature　nitrogen　adsorption-desorption,　CO　pulse　chemisorption,　CO2-TPD　and　in　situ　Diffuse　Reflectance　IR　Fourier-Transform　Spectroscopy　(in　situ　DRIFTS).　The　results　show　that　the　sintering　inhibition　of　palladium　relates　to　the　weaker　basic　site.　Owing　to　its　relative　larger　amount　of　weak　basic　site,the　prepared　Pd/Ce0.75Zr0.25O2　catalyst　exhibits　higher　Pd　dispersion　and　better　thermal　stability.