In　order　to　study　the　freeze-thaw　durability　of　the　recycled　concrete,　the　fast　freeze-thaw　cycle　tests　were　carried　out　on　fifty-four　cube　specimens　and　twenty-seven　prism　specimens　with　different　replacement　ratios　of　recy-cled　coarse　or　fine　aggregate.　Based　on　the　experiment,　appearance　features,　mass　loss　rates,　changes　of　relative　dynamic　elastic　modulus　of　prism　specimens,　and　loss　rates　of　compression　strength　of　the　cube　specimens　for　25,　50,　75　,　and　100　freeze-thaw　cycles　respectively　were　analyzed.　The　relationships　of　the　mass　loss　rate　and　the　rela-tive　dynamic　elastic　modulus　of　specimens　with　the　increase　of　freeze-thaw　cycles　were　analyzed　as　well.　The　recy-cled　aggregate　and　its　replacement　ratio,　which　are　suitable　for　building　structures　in　cold　area,　were　proposed.　Research　shows　that　after　100　freeze-thaw　cycles,　the　specimens　with　50%　replacement　ratio　of　recycled　coarse　ag-gregate　and　natural　sand　fine　aggregate　do　not　make　much　difference　compared　with　ordinary　concrete　in　appearance　features,　mass　loss　rate　and　the　relationship　of　relative　dynamic　elastic　modulus,　So　through　reasonable　design,　the　recycled　concrete　with　no　more　than　50%　replacement　rate　of　recycled　coarse　aggregate　can　be　used　for　building　structures　in　cold　areas.