Engineered　cementitious　composites　(ECC)　has　good　ductility,　with　its　unique　strain　hardening　and　multiple　cracking　characteristics.　Through　the　research　of　uniaxial　direct　tension　performance　and　durability　tests　of　ECC　blending　with　polyvinyl　alcohol　(PVA)　fiber,　the　tensile　stress-strain　curves,　the　freeze-thaw　resistances　and　the　impermeability　of　ECC　were　analyzed.　The　tensile　stress　-　strain　curve　results　show　strain　hardening　of　ECC　achieved　under　the　uniaxial　tensile　load;　PVA　fiber　has　good　crack　resistance　toughening　effect,　can　significantly　improve　crack　resistance　and　deformation　capacity　of　cementitious　composites.　The　maximum　tensile　strain　of　the　ECC　is　between　3800　mu　epsilon　to　8657　mu　epsilon　(20-50　times　that　of　polypropylene　fiber　concrete)　displays　high　toughness　and　large　deformation　characteristics.　The　freezing　level　of　the　ECC　is　higher　than　F300,　which　is　ideal　for　the　maintenance　and　reinforcement　of　concrete　structures　in　cold　regions.　Domestic　and　imported　PVA　fiber　can　significantly　improve　the　impermeability　and　crack　resistance　of　the　ECC.