The　development　of　anion　exchange　membranes　(AEMs)　that　synergistically　combine　high　performance　with　robust　stability　is　essential　for　optimizing　diffusion　dialysis　(DD)　acid　recovery.　In　response　to　this　need,　we　introduce　a　novel　strategy　employing　bromomethylated　polymers　of　intrinsic　microporosity　(PIM-Br),　pre-crosslinked　with　pentamethyldiethylenetriamine　(PMDETA),　followed　by　subsequent　simultaneous　crosslinking　and　cationization　with　4,4′-bipyridine　(BPY).　This　approach　results　in　AEMs　with　expansive　free　volume　(specific　surface　area　=　163.55　m2　g−1),　high　mechanical　strength　(tensile　stress　=　22.14　MPa),　and　exceptional　resistance　to　both　acidic　environments　and　organic　solvents,　thereby　enhancing　the　efficacy　of　acid　recovery.　Notably,　the　optimal　CPIM-BPY-5h　exhibits　superior　performance　(UH+　=　51.07　×　10−3　m　h−1,　SH+/Fe2+　=　52.16)　in　the　HCl/FeCl2　system　at　25　°C,　outperforming　the　commercial　DF-120　AEM　by　approximately　6.0-fold　in　UH+　and　over　2.8-fold　in　SH+/Fe2+,　while　demonstrating　comparable　performance　to　our　previous　porous　AEMs　derived　from　ultrafiltration　membranes,　which,　based　on　current　literature,　achieve　unprecedented　UH+　values.　However,　the　CPIM-BPY-5h　distinguishes　itself　with　significantly　enhanced　mechanical　integrity.　This　work　highlights　the　effectiveness　of　our　strategy　in　producing　membranes　with　excellent　ion　transport　capabilities,　mechanical　strength,　and　acid　and　solvent　stability,　making　them　promising　candidates　for　high-performance　acid　recovery　applications.　©　2025