In　accordance　with　current　codes,　a　single-story　single-bay　reinforced　concrete　frame　structure　in　municipal　engineering　in　eight　degree　fortification　area　shall　be　designed　as　the　first　grade.　This　requirement　is　so　rigorous　that　the　designed　cross-sectional　area　is　too　large.　In　order　to　coordinate　the　revision　work　of　＇Code　for　seismic　design　of　outdoor　water　supply,　sewerage,　gas　and　heating　engineering＇,　experiments　have　been　carried　out　on　six　1:2　scaled　single-story　single-bay　concrete　frame　models　under　cyclic　loading,　the　influence　of　different　seismic　grades　on　the　seismic　performance　of　structural　model　was　investigated.　Simulations　using　ABAQUS　was　done　under　the　same　loading.　The　results　show　that　the　seismic　performance　of　the　fourth　grade　models　meets　the　seismic　standard　performance　requirements,　and　the　safety　margin　under　second　grade　is　enough.　The　lateral　deformation　ability　of　the　single-story　single-bay　concrete　frame　is　better　than　the　first　story　in　a　multi-story　structure　because　its　axial　compression　ratio　is　small　and　its　colums　are　all　exterior.　Seismic　grade　two　is　suggested　for　single-story　single-bay　concrete　frame　in　municipal　engineering　in　degree　eight　seismic　fortification　zone.　©　2018,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.