The in-situ generation method was proposed to prepare the catalytic functional polyphenylene sulfide (PPS) filter material. PPS would be activated with C₂₁H₄₀NNaO₄S, and then treated in the metallic cations solution to adsorb Mn²⁺, Fe²⁺, Co²⁺, Ce³⁺ rapidly. After positive reaction with KMnO₄, reactive metal oxides were produced in the PPS materials. The (0.9) Mn-Ce-Fe-Co-O_x/PPS composite filter materials were characterized by SEM, EDX and TPD. Catalytic performance in the low -temperature catalytic conversion of NO and Hg⁰ were then explored. The influences of reaction temperature, O₂, NO, ammonia-nitrogen ratio and SO₂ on the catalytic performance of catalytic PPS were investigated systematically. The results showed that MnO_x, CeO_x, CoO_x, Fe₂O₃ were uniformly distributed on the PPS filter material in a flocculent structure; The catalytic PPS materials performed a synergistically NO and Hg⁰ removal efficiency of more than 80% in the conditions of T=170℃,O₂≥5%, NO≤ 500×10^-6, NSR=1.0, SO₂≤100×10^-6; The results of Hg-TPD desorption indicated that the mechanism of Hg⁰ oxidation promotion of SO₂ was that the heterogeneous reaction between SO₃ and Hg⁰ was faster than sulfation reaction of SO₂, and the NO-TPD results also showed that NO mainly acted in the form of nitrite on the surface of PPS, and followed by the form of adsorbed NO₂.