The　three-dimensionally　ordered　macroporous　(3DOM)　CeO2-supported　Au-Pd　alloys　(xAuPd(y)/3DOM　CeO2,　x　is　the　total　loading　(wt%)　of　Au　and　Pd,　and　y　is　the　Pd/Au　molar　ratio)　were　synthesized　using　the　polymethyl　methacrylate-templating　and　polyvinyl　alcohol-protected　reduction　methods.　The　samples　were　characterized　by　a　number　of　analytical　techniques,　and　their　catalytic　performance　was　evaluated　for　the　combustion　of　trichloroethylene　(TCE).　It　is　found　that　the　xAuPd(y)/3DOM　CeO2　samples　displayed　a　good-quality　3DOM　architecture,　and　the　noble　metal　nanoparticles　(NPs)　with　a　size　of　3-4　nm　were　uniformly　dispersed　on　the　skeleton　surface　of　3DOM　CeO2.　Among　all　of　the　samples,　2.85AuPd(1.)(87)/3DOM　CeO2　exhibited　the　highest　catalytic　activity,　with　the　temperature　at　a　TCE　conversion　of　90%　(T-9(0%))　being　415　degrees　C　at　a　space　velocity　of　20,000　mL/(g　h).　Furthermore,　the　2.85AuPd(1.)(87)/3DOM　CeO2　sample　possessed　the　lowest　apparent　activation　energy　(33　kJ/mol),　excellent　catalytic　stability,　and　good　moisture-　and　chlorine-tolerant　behaviors.　Alloying　of　Au　with　Pd　changed　the　pathway　of　TCE　oxidation　and　reduced　formation　of　perchloroethylene.　We　conclude　that　the　excellent　catalytic　performance　for　TCE　combustion　of　2.85AuPd(1.)(87)/3DOM　CeO2　was　associated　with　the　highly　dispersed　AuPd1.87　alloy　NPs,　high　adsorbed　oxygen　species　concentration,　good　low-temperature　reducibility,　and　strong　interaction　between　AuPd1.87　NPs　and　3DOM　CeO2　as　well　as　the　high-quality　3DOM　structure　and　high　surface　acidity.