The　efficient　adsorption　of　sulfur　dioxide　(SO2)　is　crucial　for　purifying　exhaust　gases,　and　zeolites　are　promising　adsorbents　due　to　their　low　cost　and　excellent　stability.　However,　developing　FAU-type　zeolites　with　high　adsorption　capacities　and　selectivities　remains　challenging　due　to　their　narrow　pores　and　limited　adsorption　sites.　Herein,　an　additive-free　synthesis　strategy　is　proposed　to　facilely　obtain　NaX　zeolites　(X-HCL)　with　the　house-of-card-like　morphology.　The　hierarchical　structure　of　X-HCL　not　only　benefits　the　removal　of　SO2　through　favorable　spatial　diffusion,　but　also　promotes　the　loading　of　basic　adsorption　sites-　[caprolactam]　[tetrabutylammonium　bromide]　(CT)　ionic　liquid.　The　obtained　CT/X-HCL　adsorbent　demonstrates　remarkable　SO2　adsorption　capacity　(10.58　mmol/g)　and　cyclic　stability,　as　well　as　great　selectivity　of　SO2/N2　(1673)　and　SO2/CO2　(219)　due　to　the　strong　affinity　of　CT　towards　SO2.　Moreover,　co-feeding　with　water　vapor　benefits　the　adsorption　of　SO2　on　CT/X-HCL　owing　to　the　enhanced　chemisorption　of　hydrated　CT　for　SO2.　This　research　provides　new　insights　into　the　construction　of　hierarchical　zeolite　for　efficient　adsorption　and　separation　of　SO2.　©　2024　Elsevier　B.V.