In　this　work,　four　series　of　SCC　specimens　which　cement　replacement　ratio　by　fly　ash　was　30,　40,　50,　and　60%,　respectively,　and　one　series　of　normal　concrete　comparative　specimens　were　designed.　For　the　same　series　specimens,　the　fly　ash　addition　was　fixed,　but　the　loading　value　was　0.0,　0.2,　0.4,　and　0.6　times　of　the　28　d　concrete　flexural　strength,　respectively.　Using　accelerated　carbonation　test,　the　effects　of　fly　ash　additions,　tensile　stress　rates,　and　compressive　stress　rates　on　carbonation　rate　of　SCC　are　studied.　Based　on　the　test　results,　a　model　considered　both　effects　of　fly　ash　addition　and　stress　rate　for　predicting　the　carbonation　depth　of　SCC　under　real　environment　conditions　is　set　up.　These　results　can　provide　a　reference　for　carbonation　resistance　design　of　SCC.