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Concrete was damaged under the interaction of carbonation and freeze-thaw which is a factor why many concrete structures did not reach the design life and premature failure.Carbonization test, freeze-thaw test and the alternating action of freeze-thaw and carbonization were taken to messure the depth of carbonation, relative dynamic elastic modulus, mass loss rate and flexural strength.The results show that carbonation depth of both specimens conducted carbonization test followed by freeze-thaw test and specimens conducted freeze-thaw test followed by carbonization test increases with the increase of water-binder ratio or mixing amount of fly ash, in general.But specimens conducted freeze-thaw test firstly have far greater carbonation depth than specimens conducted carbonization test firstly.The dynamic elastic modulus loss and weight loss of carbonized specimens are smaller than that ofuncarbonized specimens within a reasonable range of carbonation.The flexural strength of both specimens conducted carbonization test followed by freeze-thaw test and specimens conducted freeze-thaw test followed by carbonization test declines with the increase of water-binder ratio or mixing amount of fly ash.