Conjugated　micro-mesoporous　poly(aniline)s　(CMPAs)　synthesized　through　Buchwald-Hartwig　coupling　represent　a　cutting-edge　material　platform　for　selective　sequestration　of　Hg　(II)　but　suffer　from　moderate　porosities　and　constrained　availability　of　adsorption　sites.　Herein,　we　show　a　salt　strategy　for　fine-tuning　the　porosity　and　Hg　(II)　adsorption　performance　of　a　series　of　S,　N　dual　heteroatom　functionalized　CMPAs　(CMPA-SN).　The　salt　of　NaF　with　appropriate　dosage　results　in　strikingly　improved　surface　areas　from　26　to　735　m2/g　and　intensified　Hg　(II)　adsorption　capacity　from　311　mg/g　to　649　mg/g.　Moreover,　CMPA-SN　exhibits　an　efficient　adsorption　rate　(h　=　1250　mg/g/min)　and　excellent　affinity　with　high　Kd　as　high　as　1.24　x　106　mL/g.　We　successfully　correlate　the　adsorption　capacity　and　surface　area,　and　reveal　the　synergistic　electron-sharing　mechanism　from　N-containing　ligands　and　in-situ　decorated　S　heteroatoms,　with　67.6　%/32.4　%　contributions　and　Delta　Eads　=　-0.419　eV/Delta　Eads　=　-0.487　eV　adsorption　energy.