Diffusion　dialysis　(DD)　employing　anion　exchange　membranes　(AEMs)　presents　an　attractive　opportunity　for　acid　recovery　from　acidic　wastewater.　However,　challenges　exist　to　make　highly　acid　permeable　AEMs　due　to　their　low　acid　dialysis　coefficient　(Uacid).　Here,　a　series　of　porous　and　highly　acid　permeable　AEMs　fabricated　based　on　chloromethyl　polyethersulfone　(CMPES)　porous　membrane　substrate　with　crosslinking　and　quaternization　treatments　is　reported.　Such　porous　AEMs　show　high　Uacid　because　of　the　large　free　volume　as　well　as　the　significantly　reduced　ion　transport　resistance　relative　to　the　dense　AEMs.　Compared　with　the　commercial　dense　DF-120　AEM,　our　optimal　porous　AEM　show　simultaneous　466.7%　higher　Uacid　and　75.7%　higher　acid/salt　separation　factor　(Sacid/salt)　when　applied　to　acid　recovery　at　the　same　condition.　Further,　considering　the　simple　and　efficient　fabrication　process　as　well　as　the　low　cost,　our　membranes　show　great　prospects　for　practical　acid　recovery　from　industrial　acidic　wastewater.