High-strength　mortar　(HSM)　gradually　has　wide　applications　due　to　its　exceptional　strength,　micro-expansion　properties,　and　excellent　fluidity.　Behavior　deterioration　of　structures　in　saline　soil　areas　is　primarily　attributed　to　freeze-thaw　cycles　and　sulfate　attack.　In　this　study,　the　coupling　effect　of　freeze-thaw　cycles　and　sulfate　attack　on　the　appearance,　mass　loss,　and　relative　dynamic　elastic　modulus　of　HSM　was　investigated　during　erosion.　Then,　compressive　experiments　were　conducted　to　assess　the　mechanical　properties　of　HSM　subjected　to　both　freeze-thaw　cycles　and　sulfate　attack.　The　influences　of　coupling　freeze-thaw　cycles　and　sulfate　attack　on　the　compressive　properties　of　HSM　were　quantified　through　regression　analysis　of　experimental　results.　Empirical　models　for　compressive　stress-strain　curves　and　damage　constitutive　behavior　of　HSM　were　developed,　taking　the　coupled　adverse　effect　into　account.　The　results　indicate　that　the　coupled　effect　of　freeze-thaw　cycles　and　sulfate　attack　causes　performance　deterioration　of　HSM.　The　empirical　models　reproduce　the　compressive　behaviors　of　HSM　subjected　to　freeze-thaw　cycles　and　sulfate　attack.