Ru/TiO2　and　Ru-Ce/TiO2　catalysts　were　prepared　by　the　equal-volume　impregnation　method　to　test　their　catalytic　oxidation　of　chlorobenzene(CB),　with　the　aim　to　investigate　the　effect　of　Ce　addition　on　the　redox　capacity　of　the　catalysts　under　the　premise　of　reducing　the　content　of　noble　metals.　It　was　found　that　the　introduction　of　Ce　conserved　the　high　catalytic　efficiency　of　the　catalyst　while　reducing　the　content　of　noble　metal,　and　the　catalysis　of　CB　was　greatly　improved　at　low　temperatures.　Compared　with　the　0.4Ru/TiO2　catalyst,　the　T-10　and　T-90　of　the　0.4Ru-1.0Ce/TiO2　catalyst　decreased　by　50　degrees　C　and　60　degrees　C　respectively.　It　presented　high　reaction　rate　at　170.　with　an　increase　from　1.21　x　10(-8)　mol/min.m(2)　for　the　0.4Ru/TiO2　catalyst　to　10.45　x　10(-8)　mol/min.m(2),　making　it　even　better　than　the　2.0Ru/TiO2　catalyst.　The　structure　and　morphology　of　the　Ru/TiO2　catalyst　did　not　change　with　the　Ce　doping　and　the　mesoporous　structure　of　the　catalysts　was　maintained.　CeO2　can　not　only　store　and　release　oxygen,　but　also　improve　the　activity　and　dispersion　of　precious　metal　loaded.　The　formation　of　Ru-O-Ce　under　the　interaction　between　CeO2　and　Ru　species　promoted　electron　transfer　and　improved　the　mobility　of　surface　oxygen,　thus　forming　RuOx　with　higher　valance.　The　introduction　of　Ce　improved　the　yield　of　COx　and　selectivity　towards　inorganic　chlorine　(HCl　and　Cl-2)　and　prevented　the　catalyst　from　producing　more　chlorinated　by-products,　thus　greatly　reducing　the　chance　of　producing　more　toxic　dioxins.