Engineered　Cementitious　Composite　(ECC)　is　an　advanced　composite　material　with　strain-hardening　and　multiple-cracking　behaviors.　In　this　study,　two　types　of　ECC　materials　were　troweled　on　masonry　infill　walls　strengthened　with　expansion　bolt　and　interfacial　agent.　The　seismic　performance　of　the　unreinforced　and　the　ECC　reinforced　masonry　structures　was　evaluated　by　the　reversed　cyclic　loading　test.　The　results　showed　that　the　application　of　the　ECC　on　the　masonry　infill　walls　can　improve　the　ultimate　bearing　capacity　(in　plane),　ductility,　stiffness　and　accumulative　energy　dissipation　of　the　structure.　Compared　with　the　masonry　structure　with　one　side　reinforced　by　the　ECC,　the　structure　with　both　sides　reinforced　by　the　ECC　could　better　improve　the　ultimate　bearing　capacity,　stiffness　and　cumulative　energy　dissipation　with　little　difference　on　the　ductility　improvement.　Moreover,　the　expansion　bolt　and　the　interfacial　agent　used　to　improve　the　connection　between　the　ECC　and　the　masonry　structure　have　the　ability　to　greatly　increase　the　mechanical　properties　of　the　structure　under　cyclic　loading.