Polyphenylene　sulfide　(PPS)　has　good　corrosion　resistance,　chemical　stability,　and　thermal　stability,　which　was　widely　applied　in　precipitator　field.　In　this　paper,　a　novel　in　situ　synthesis　protocol　was　selected　to　fabricate　the　Mn-CeOx/PPS　functional　composites　with　excellent　low-temperature　denitration　activity.　Results　show　that　the　as-obtained　Mn-CeOx/PPS　filter　possessed　of　superb　denitration　activity　at　180　degrees　C　under　a　weight　hourly　space　velocity　of　210,000　mL/g(cat)/h,　which　may　be　stemmed　from　the　generation　of　amorphous　and　well-dispersed　mixed　metal　oxide　catalysts.