Recycled　brick　powder　engineered　cementitious　composites　(ECC)　was　prepared　by　replacing　quartz　sand　in　ECC　with　recycled　brick　powder.　The　mass　loss　rate　and　relative　dynamic　elastic　modulus　of　recycled　brick　powder　ECC　under　the　erosion　of　NaCl　solution,　Na2　SO4　solution　and　NaCl　+　Na2　SO4　solution　were　studied　by　rapid　freeze-thaw　test　of　concrete.　The　damage　model　of　ECC　under　salt　frost　erosion　environment　was　established,　and　its　durability　was　evaluated.　The　results　show　that　after　300　freeze-thaw　cycles,　the　mass　loss　rates　of　recycled　brick　powder　ECC　in　water,　NaCl　salt　solution,　Na2　SO4　solution　and　NaCl　+　Na2　SO4　salt　solution　are　2.　884%,　4.　984%,　1.　955%　and　6.　891%,　respectively.　The　relative　dynamic　elastic　modulus　decreases　by　6.　468%,　16.　300%,　24.　303%　and　39.　861%,　respectively.　The　frost　resistance　grade　of　recycled　brick　powder　ECC　is　greater　than　F300　in　the　case　of　single　salt-freezing,　and　the　frost　resistance　grade　is　greater　than　F250　in　the　case　of　composite　salt-freezing,　which　has　good　salt-freezing　resistance.　The　established　freeze-thaw　damage　model　can　better　reflect　the　relationship　between　the　damage　degree　Dn　of　ECC　under　different　freeze-thaw　media　and　the　number　of　freeze-thaw　cycles,　which　can　provide　an　effective　reference　for　structural　durability　design　in　severe　cold　regions.　©　2024　Bulletin　of　the　Chinese　Ceramic　Society　Press.　All　rights　reserved.