Attempts　to　develop　adsorbents　for　toxic　Hg　(II)　removal　from　wastewater　in　an　all-round　high-capacity,　rapid-kinetic　and　super-selective　manner　remain　interesting　but　unsolved.　Here,　we　report　a　novel　class　of　conjugated　micro-mesoporous　poly(aniline)s　(CMMPAs)　by　an　ingenious　integrated　porosity　design　and　decoration　over　porous　organic　polymers　(POPs).　We　pre-create　unstable　ZIF-7-NH2　and　crosslink　it　into　POPs　but　remove　it　subsequently　through　a　time-saving　acid　wash　to　allow　the　formation　of　mesopores　and　the　“in-situ”　decoration　of　ZIF-7-NH2　ligands　as　adsorption　sites　on　the　pore　wall.　The　resulting　adsorbent　exhibits　an　ultra-high　capacity　of　1032　mg　g−1,　extremely　fast　kinetic　with　h　of　1425　mg　g−1　min−1　that　could　reduce　Hg　(II)　from　10　to　1　ppm　in　2　s　and　further　to　2　ppb　in　ca.　30　min,　and　nearly　100%　exclusive　adsorption　towards　Hg　(II).　The　mesopore　volume　within　15–50　nm　as　created　is　responsive　to　the　diffusion　coefficient　k2　(k2　=　0.0215　V-0.000079);　the　outstanding　capture　is　also　essentially　trigged　by　the　unique　affinity　from　N　sites,　thus　highlighting　CMMPA　as　an　appealing　platform　for　drinking-water　purification　that　would　significantly　serve　for　practical　environmental　application.　©　2023　Elsevier　B.V.